Danfoss IOX024-020 is an IO function block that enables communication with the IOX024-x20 expansion module so that additional inputs and outputs can be used. It can be used for connecting sensors, actuators, and other devices to a CAN bus network. The device has 24 digital inputs, 8 analog inputs, 8 digital outputs, and 8 analog outputs. It also has a CAN shield input that can be used to determine the CAN message identifiers used by the device. The IOX024-020 can be used in a variety of applications, such as industrial automation, building automation, and vehicle control.
Danfoss IOX024-020 is an IO function block that enables communication with the IOX024-x20 expansion module so that additional inputs and outputs can be used. It can be used for connecting sensors, actuators, and other devices to a CAN bus network. The device has 24 digital inputs, 8 analog inputs, 8 digital outputs, and 8 analog outputs. It also has a CAN shield input that can be used to determine the CAN message identifiers used by the device. The IOX024-020 can be used in a variety of applications, such as industrial automation, building automation, and vehicle control.
Revision history Table of revisions
Date Changed Rev
July 2018 Rebranding 0101
June 2009 AB
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IOX024-x20 Function Block
Configure CAN...................................................................................................................................................................................4
Inputs – Power Supply....................................................................................................................................................................5
Inputs – CAN Shield.........................................................................................................................................................................5
Inputs – Digital Inputs.....................................................................................................................................................................6
Inputs – Sensor Power....................................................................................................................................................................6
Inputs – Multifunction Inputs...................................................................................................................................................... 6
Inputs – Output Status....................................................................................................................................................................7
Outputs – Group...............................................................................................................................................................................7
Outputs – MultiFunction Outputs..............................................................................................................................................8
Inputs – CAN.......................................................................................................................................................................................8
Connections and Signal Overview.............................................................................................................................................9
Configuring Communications...................................................................................................................................................10
Variable Addressing Mode....................................................................................................................................................10
Predefined Addressing Mode.............................................................................................................................................. 10
Fixed Addressing Mode..........................................................................................................................................................10
Volatile Parameters..................................................................................................................................................................11
Non-Volatile Parameters........................................................................................................................................................11
Timing Configurations............................................................................................................................................................11
CAN Bus Load.............................................................................................................................................................................11
CAN Message Identifiers..............................................................................................................................................................11
Troubleshooting.............................................................................................................................................................................12
User Manual
PLUS+1® Compliant IOX024-x20 Function Block
Contents
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The IO_Module function block enables communication with the IOX024-x20 expansion module so that
additional inputs and outputs can be used.
Configure CAN
Set up CAN so that CAN messages can be transmitted to and from the I/O module.
Input Type Range Description
CAN Bus —— In the GUIDE template, identify the CAN bus that contains CAN messages to and from the I/O
module. Route this bus to the CAN input on this function block.
CAN messages sent from the I/O module to the function block contain information about the
I/O modules’ inputs, outputs and configuration. CAN messages sent to the I/O module from the
function block set outputs and configurations.
Baudrate U32 50000–1000000 The Baudrate is the speed of the CAN Port.
Port Port —— Assigns the hardware CAN port that transmits the data.
AddrMode U8 0–2 I/O module addressing mode.
0: Variable ID addressing mode. The I/O module Tx and Rx message identifiers are determined
by the I/O module measuring the voltage on its CAN shield input and matching that value with a
predefined range and matching identifiers in the I/O Module CAN Message Identifiers table. The
CAN messages use 11 bit identifiers in this mode.
1: Predefined ID addressing mode. The I/O module Tx and Rx message identifiers are
determined by Node/N1. These identifiers are selected by matching to the N1 value in the I/O
Module CAN Message Identifiers table. The CAN messages use 11 bit identifiers in this mode.
2: Fixed ID addressing mode. The I/O module Tx and Rx message identifiers are determined
directly by setting Tx ID and Rx ID. The CAN messages use either 11 bit or 29 bit identifiers in
this mode, as determined by Frame.
Tx ID U32 0x00–0x1FFFFFFF Tx ID is the CAN message identifier used by the function block for sending messages to the I/O
module when using the Fixed ID addressing mode.
When using the service tool to configure the I/O module, this value corresponds to the Rx
parameter saved on the I/O module.
Rx ID U32 0x00–0x1FFFFFFF Rx ID is the CAN message identifier used by the function block for receiving messages from the
I/O module when using the Fixed ID addressing mode.
When using the service tool to configure the I/O module, this value corresponds to the Tx
parameter saved on the I/O module.
Frame U8 0–1 Sets CAN message identifier length when using the Fixed ID addressing mode.
0: 11 bit ID
1: 29 bit ID
Node/N1 U8 0–15 The KWP2000 node address used for communications between the I/O module and the PLUS+1
®
Service Tool is Node/N1 x 8. For Variable ID addressing mode and Predefined addressing mode
this value also determines the CAN.
Net U8 0–255 KWP2000 network used for communications between the I/O module and the PLUS+1
®
Service
Tool.
Enable BOOL —— Enables the function block to send CAN messages to the I/O module. An F/T transition or T at
power up starts initialization.
Enbl_RecheckCRC BOOL —— Determines if the I/O module CRC is periodically checked to ensure the device’s configuration
matches the function block’s configuration.
T: The CRC is requested from the I/O module and compared every 5 seconds.
F: The CRC is only requested from the I/O module during initialization.
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Input Type Range Description
Enbl_ResetTest BOOL —— Determines if the I/O module volatile memory is periodically checked to ensure the device has
not lost volatile configuration information due to temporary loss of power.
T: Volatile information is requested from the I/O module and compared every 1 second.
F: Volatile memory is not checked after initialization and temporary loss of power to the I/O
module may go undetected.
BusRecvryTm U16 0–65535 BusRecvryTm sets the time the I/O module CAN port waits after going into a “bus off” condition
before attempting to go back on the bus.
1000 is 1 ms.
DriverRecvryTm U16 0–65535 DriverRecvryTm sets the time the I/O module CAN port waits after a CAN error causes the
driver to reset before attempting to go back on the bus.
1000 is 1 ms.
RepTime_Supply U16 0–65535 Determines how often the Power, Sensor Power, and CAN Shield input values are transmitted
from the I/O module.
1000 is 1 ms.
RepTime_Status U16 0–65535 Determines how often the Output Status values are transmitted from the I/O module.
1000 is 1 ms.
RepTime_Inputs U16 0–65535 Determines how often the MFIn and DigIn values are transmitted from the I/O module.
1000 is 1 ms.
RepTime_Outputs U16 0–65535 Determines how often the Output values are transmitted to the I/O module.
1000 is 1 ms.
TimeOut_Outputs U16 0–65535 Sets the maximum time allowed between commands for each output. If a command is not
received by the I/O module before the TimeOut_Outputs elapses then that output reverts to its
default output value and default pin configuration.
1000 is 1 ms.
Inputs – Power Supply
The status of power supply input on the connector and pin C1p02 is described.
Signal Type Direction Range Description
C1p02_Pwr Bus —— ——
AnIn U16 Input 0 – 32767 Analog input AD count.
Due to CAN message optimization, this value is approximated by scaling the Volt
signal.
Volt U16 Input 0 – 36000 Analog input voltage
100 is 100 mV.
Updated BOOL Input —— True when the AnIn and Volt signals are refreshed.
Inputs – CAN Shield
The status of analog and CAN0 shield inputs on the connector and pin C1p05 is described.
Signal Type Direction Range Description
C1p05_AnIn Bus —— ——
AnIn U16 Input 0 – 32767 Analog input AD count.
Due to CAN message optimization, this value is approximated by scaling the Volt
signal.
Volt U16 Input 0 – 5250 Analog input voltage.
100 is 100 mV.
Updated BOOL Input —— True when the AnIn and Volt signals are refreshed.
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Inputs – Digital Inputs
The status of digital input on the connectors and pins C1p06 and C1p07 is described.
Signal Type Direction Range Description
Pin _DigIn Bus —— ——
DigIn BOOL Input —— Digital input state according to the PinConfig.
Config Bus —— ——
PinConfig U16 Output 1 – 2 Determines how the input pin is internally connected.
1: Activated with Ground. The internal Pull Up resistor is connected to an internal 5
V. The internal Pull Down resistor is disabled.
2: Activated with 5 V or Supply Voltage. The internal Pull Up resistor is disabled. The
internal Pull Down resistor is connected to Ground.
Updated BOOL Input —— True when the DigIn signal is refreshed.
Inputs – Sensor Power
The status of the sensor power on the connector and pin C1p08 is described.
Signal Type Direction Range Description
C1p08_SnsrPwr Bus —— ——
AnIn U16 Input 0 – 32767 Analog input AD count.
Due to CAN message optimization, this value is approximated by scaling the Volt
signal.
Volt U16 Input 0 – 5250 Analog input voltage.
100 is 100 mV.
Updated BOOL Input —— True when the AnIn and Volt signals are refreshed.
Inputs – Multifunction Inputs
The status of the multifunction inputs on connectors and pins C1p10, C1p11, C1p12, C2p01, and C2p02 is
described.
Signal Type Direction Range Description
Pin _MFIn Bus —— ——
Config Bus —— ——
PinConfig0 U16 Output 0 – 3 Determines how the input pin is internally connected.
0: Activated with 5 V or Supply Voltage. The internal Pull Down and Pull Up
resistors are disabled.
1: Activated with Ground. The internal Pull Up resistor is connected to an internal
5 V. The internal Pull Down resistor is disabled.
2: Activated with 5 V or Supply Voltage. The internal Pull Up resistor is disabled.
The internal Pull Down resistor is connected to Ground.
3: Activated with Supply Voltage. The internal Pull Up resistor is connected to an
internal 5 V. The internal Pull Down resistor is connected to Ground.
PinConfig1 U16 Output 0 – 3 Sets the maximum input voltage to allow maximum possible input resolution.
0: 0 – 5.26 V
1: 0 – 0.3675 V
2: 0 – 35.3 V
3: 0 – ~2.465 V (not recommended)
DigInConfigHigh U16 Output 0 – 65535 DigInConfigHigh is the voltage level required for DigIn to transition from false to
true.
100 is 100 mV.
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Signal Type Direction Range Description
DigInConfigLow U16 Output 0 – 65535 DigInConfigLow is the voltage level required for DigIn to transition from true to
false.
100 is 100 mV.
DigIn BOOL Input —— Digital input state according to PinConfig0, DigInConfigHigh and
DigInConfigLow.
AnIn U16 Input 0 – 32767 Analog input AD count.
Due to CAN message optimization, this value is approximated by scaling the Volt
signal.
Volt U16 Input 0 – 35300 Analog input voltage.
The actual maximum value is determined by PinConfig1.
100 is 100 mV.
Freq U16 Input 0 – 35300 Input Signal Frequency
100 is 100 Hz.
AnIn_Updated BOOL Input —— True when the DigIn, AnIn and Volt signals are refreshed.
Freq_Updated BOOL Input —— True when the Freq signal is refreshed.
Inputs – Output Status
The output status of inputs on connectors and pins C2p03, C2p04, C2p05, C2p06, C2p07, C2p08, C2p09,
and C2p10 is described.
Signal Type Direction Range Description
Pin _Status Bus —— ——
FeedBackValue S16 Input -32768 –
32767
Measured current flowing through the output pin.
1000 = 100 mA
PinStatus U16 Input 0 – 2 Output pin status
0: OK
1: Incorrect pin configuration
2: Overload detected
Updated BOOL Input —— True when the FeedBackValue and PinStatus signals are refreshed.
Outputs – Group
The status for two groups of outputs is described.
A pin group is for C2p03, C2p04, C2p05 and C2p06.
Another pin group is for C2p07, C2p08, C2p09 and C2p10.
Signal Type Direction Range Description
CurChgLim U16 Output 22 – 333 CurChgLim defines the maximum rate of change of current for the group of
outputs. This parameter is only used when the output’s PinConfig is 4 or 5.
111 is 11.1 mA/ms.
DitherFreq U16 Output 40 – 250 Sets dither frequency when output dither is enabled for the group.
40 is 40 Hz.
ReqFreq U16 Output 30 – 4000 Sets the base PWM frequency for the group.
30 is 30 Hz.
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Outputs – MultiFunction Outputs
The status of the multifunction outputs on connectors and pins C2p03, C2p04, C2p05, C2p06, C2p07,
C2p08, C2p09, and C2p10 is described.
Signal Type Direction Range Description
Pin _MFOut Bus —— ——
Config Bus —— ——
PinConfig U16 Output 0 – 8 Output pin configuration
0: Digital Output, Push/Pull
1: Digital Output, Sourcing
2: Digital Output, Sinking
3: PWM Output, 0 – 10000 [0.01% positive duty]
4: PWM Output, 0 – 30000 [0.1 mA]
5: PWM Output, 0 – 30000 [0.1 mA] Dither Enabled
6: PVE Output, 0 – 10000 [0.01% of PVE Power]
7: HBridge Output, 0 – 10000 [0.01% positive duty]
8: PWM Output 0 – 30000 [0.1 mA] current control bidirectional
DefPinConfig U16 Output 0 – 8 Default Output pin configuration used at startup before the master/slave
communication initiates.
0: Digital Output, Push/Pull
1: Digital Output, Sourcing
2: Digital Output, Sinking
3: PWM Output, 0 – 10000 [0.01% positive duty]
4: PWM Output, 0 – 30000 [0.1 mA]
5: PWM Output, 0 – 30000 [0.1 mA] Dither Enabled
6: PVE Output, 0 – 10000 [0.01% of PVE Power]
7: HBridge Output, 0 – 10000 [0.01% positive duty]
8: PWM Output 0 – 30000 [0.1 mA] current control bidirectional
DefOutputValue U16 Output 0 – 10000 or
0 – 30000
Default Output value used when the I/O module has not received an output
command within the previous TimeOut_Output. The output range depends on
PinConfig.
1000 is 10.00%.
or
1000 is 100.0 mA.
DigOut BOOL Output —— Output command if PinConfig = 0, 1 or 2.
OutputValue U16 Output 0 – 10000 or
0 – 30000
Output command if PinConfig = 3, 4, 5, 6, 7 or 8. The output range depends on
PinConfig.
1000 is 10.00%.
or
1000 is 100.0 mA.
DitherAmp U16 Output 0 – 5000 Amplitude of dither applied when dither is enabled.
1000 is 100.0 mA.
Inputs – CAN
Diagnostic and status information about CAN communications with the I/O module is described.
The signals appear in both the Input and Output buses.
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Signal Type Direction Range Description
CAN Bus —— ——
CommStatus U16 Input 1 – 8, 255 Current status of communication with the I/O module.
0: CAN message transmission is disabled.
1: Protocol Version request is being sent to the I/O module.
2: Waiting for protocol version and hardware information response.
3: The function block is sending all stored parameters to the I/O module.
4: The function block is sending all volatile parameters to the I/O module.
5: CRC request is being sent to the I/O module.
6: Waiting for CRC response.
7: The I/O module is properly configured and in the normal operational state.
8: The function block’s output pin configurations have changed. The new
configurations are being transmitted to the I/O module. Outputs are disabled.
9 – 254: Undefined.
255: Incompatible protocol or hardware. Communication to the I/O module is
stopped.
Configured BOOL Input —— True when communication is established.
Incompat_HW BOOL Input —— The responding hardware does not match the I/O module application layer part
number expected by the function block. No more messages are sent to the I/O
module.
Incompat_Protocl BOOL Input —— The responding hardware uses an incompatible version of the I/O protocol. Update
the firmware running on the hardware, or use a newer version of the function block
for proper communication. No more messages are sent to the I/O module.
This version function block requires I/O module hardware using protocol version
2.00 to 2.99.
ProtocolVersion U16 Input 0 – 65535 I/O communication protocol version used by the I/O module hardware.
200 is version 2.00.
Connections and Signal Overview
When more than one I/O module is used in an application each block requires unique Inputs and
Outputs bus connections. For example, IO_Bus, IO_Bus1, IO_Bus2 are needed.
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Configuring Communications
The parameters that control the communication between a controller and an I/O module are described.
Variable Addressing Mode
Variable addressing mode is the default addressing mode of the I/O module, but it is not the default
mode for the function block.
When the device is powered, the CAN shield input voltage is measured. Communication parameters are
determined from the I/O Module CAN Message Identifiers table. For proper communication between the
function block and the I/O module, the corresponding N1 value from the table must be entered in the
function block and AddrMode must be set to 0.
Every time the device is powered, the CAN shield input voltage must be within the same N1 range for the
function block and device to reach the Configured status. After the device is powered, the CAN shield
input voltage has no effect on communication.
Predefined Addressing Mode
Predefined addressing mode is the default addressing mode for the function block, but it is not the
default mode for the I/O module.
In this mode, the I/O module reads the N1 value stored in non-volatile memory (EEPROM).
Because the function block and the I/O module use different default addressing modes, as long as the N1
value determined in the I/O module matches the N1 value set in the function block, the device is
configured using predefined addressing mode during all subsequent power cycles. As such, the proper
CAN shield voltage is only required during the first device initialization.
If setting the CAN shield voltage is not practical, use the PLUS+1
®
Service Tool to set the AddrMode to 1
and to set the required N1 value.
Fixed Addressing Mode
Fixed addressing mode allows for any pair of CAN message identifiers to be used for I/O module
communication.
In this mode, the I/O module relies on the RX_ID, TX_ID, and Frame parameters for communication with
the function block. Use the PLUS+1
®
Service Tool to set the proper values to match the function block and
to set the AddrMode.
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Volatile Parameters
Once initial communication is established, all volatile parameter configuration messages are sent to the
I/O module.
Non-Volatile Parameters
After volatile parameters are configured, the function block sends a request for the configuration CRC to
the I/O module.
If this number matches the locally calculated value, then the configurations stored on the I/O module
match those set in the function block. If the numbers do not match, then all configuration commands are
sent and the CRC is requested again.
You can use the PLUS+1
®
Service Tool to access all non-volatile parameters on the I/O module.
Timing Configurations
Timing for messages to and from the I/O module is established after all other configurations are sent.
CAN Bus Load
Adjust the average amount of message transmissions on the CAN bus to allow for bursts and other
increased message transmission situations.
Any CAN bus has a maximum message transmission capacity. So, to allow for situations that can cause
increases in messages, minimize the CAN bus load.
The CAN bus load is the average amount of message transmission on a CAN bus. Use the PLUS+1
®
CG150
USB/CAN gateway and CANKing software to view CAN bus loads.
PLUS+1
®
I/O modules communicate with their associated controllers over a CAN bus. System developers
can adjust I/O module RepTime and TimeOut parameters to manage CAN bus loading. Increasing these
times reduces the CAN bus load. Decreasing these times increases CAN bus load.
CAN Message Identifiers
The function block uses the following message identifiers to enable communication between the
controller and the I/O module.
I/O Module CAN Message Identifiers
CAN Shield Voltage [mV] N1 KWP2000 Node Tx ID Rx ID
0 – 299 0 0 0x180 0x300
300 – 599 1 8 0x188 0x308
600 – 899 2 16 0x190 0x310
900 – 1199 3 24 0x198 0x318
1200 – 1499 4 32 0x1A0 0x320
1500 – 1799 5 40 0x1A8 0x328
1800 – 2099 6 48 0x1B0 0x330
2100 – 2399 7 56 0x1B8 0x338
2400 – 2699 8 64 0x1C0 0x340
2700 – 2999 9 72 0x1C8 0x348
3000 – 3299 10 80 0x1D0 0x350
3300 – 3599 11 88 0x1D8 0x358
3600 – 3899 12 96 0x1E0 0x360
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I/O Module CAN Message Identifiers (continued)
CAN Shield Voltage [mV] N1 KWP2000 Node Tx ID Rx ID
3900 – 4199 13 104 0x1E8 0x368
4200 – 4499 14 112 0x1F0 0x370
4500 – 15 120 0x1F8 0x378
Troubleshooting
Find out how to ensure the outputs of the I/O module function properly, and make sure your changes to
parameters are saved.
Problem Cause Solution
Outputs of I/O module do not
function as expected. Configured is
always false.
The I/O module is using variable address mode
and the CAN shield voltage does not fall within
the range matching the function block’s N1
value.
Use the I/O Module CAN Message Identifiers table to find the
correct voltage and ensure it is applied to the CAN shield
during power up.
Change the N1 value in the function block to match the
voltage applied to the CAN shield.
Incompat_HW is true. The function block is
communicating with a device other than the I/O
module.
Ensure the proper addressing mode and corresponding
communication parameters are set on both the I/O module
and the function block.
It is possible the I/O module is correctly configured, but a
second I/O module has a similar configuration. Review
configuration and make changes to the other I/O modules.
Incompat_Protocl is true. The firmware on the
I/O module uses a version of the I/O Protocol less
than 2.00.
Update the I/O module with the latest firmware.
Incompat_Protocl is true. The firmware on the
I/O module uses a version of the I/O Protocol
later than version 2.99.
Replace the function block by using the latest available
HWD file.
When changing the I/O module ’s
parameters with the PLUS+1
®
Service
Tool, those changes are not properly
saved.
A function block detects the changes and resets
the parameters to the values specified in the
function block.
Disconnect the function block’s controller before making
parameter changes. If the changes do not result in different
CAN message identifiers for the I/O module, then
reconnecting the controller results in the parameters
reverting back to the values set in the function block.
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Danfoss IOX024-020 is an IO function block that enables communication with the IOX024-x20 expansion module so that additional inputs and outputs can be used. It can be used for connecting sensors, actuators, and other devices to a CAN bus network. The device has 24 digital inputs, 8 analog inputs, 8 digital outputs, and 8 analog outputs. It also has a CAN shield input that can be used to determine the CAN message identifiers used by the device. The IOX024-020 can be used in a variety of applications, such as industrial automation, building automation, and vehicle control.
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