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Xmart RS485 MODBUS User manual

  • Hello! I've reviewed the MODBUS RS-485 Card Reference Manual and I understand it details the installation and configuration for communicating with UPS devices using the MODBUS serial protocol. It covers configuring the card's ID, communication format, and RS-485 settings via switches, as well as connection via external converters. I'm ready to answer any questions you have about the information provided in this document.
  • Where is the MODBUS card installed?
    What communication protocol does the card use?
    How is the Modbus ID configured?
    How is the communication format configured?
MODBUS RS-485 CARD
REFERENCE MANUAL
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ENGLISH
1.- Introduction
MODBUS card is designed to be installed in SNMP port of all our Online UPS. This card can provide
communication for the UPS under MODBUS serial communication protocol.
2.- Product Description
1. RS-485 port
2. Connector
3. Address switch
4. Communication setting
5. Resistance switch
3. Installation
1. Configure Modbus ID (according to section 4)
2. Configure communication format (according to section 4)
3. Configure RS-485 (according to section 4)
4. Insert Modbus card into the intelligent slot in the UPS (/according to figure 1)
5. Connect AC input to the UPS
6. Connect Modbus card to the computer (an external converter could be necessary)
MODBUS RS-485 CARD
REFERENCE MANUAL
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Figure 1: Remove slot cover & Insert Modbus card into the slot
4. Configuration
4.1. Configure Modbus ID:
Configure using SW1:
Switch down = ON = 1.
Switch up = OFF = 0.
First bit is in the right switch.
4.2. Configure Communication format:
Configure using switches from 1 to 4 in SW2
Function Bit Setting
Baud
rate
# 2 # 1 Configuration
OFF OFF 2400bps
OFF ON 4800bps
ON OFF 9600bps
ON ON 19200bps (default)
Parity
check
# 4 # 3 Configuration
OFF OFF Even parity
ON OFF Odd parity
OFF ON No parity check
1 stop bits (default)
ON ON No parity check
2 stop bits
MODBUS RS-485 CARD
REFERENCE MANUAL
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4.3. Interface Pin-out:
Pin Function
4 RS-485-B
5 RS-485-A
8 GND
5. PC Communication
SERIAL COMMUNICATION:
For connecting serial communication to a PC, an external converter must be used. There are 2 types: (1)
RS485 to RS232 converter or (2) RS485 to Modbus/TCP converter as indicated in below figures. These
converters are not included with this RS485 card.
RS485 to RS232 converter:
RS485 to TCP (LAN) converter:
MODBUS RS-485 CARD
REFERENCE MANUAL
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Configure RS-485 Resistance:
Configure using switches from 6 to 8 in SW2
Function Bit # Set Configuration
Push up
resistance # 6 ON Enable (Default)
OFF Disable
Push down
resistance # 7 ON Enable (Default)
OFF Disable
Terminate
resistance # 8 ON Enable (Default)
OFF Disable
/