A - 8
Generic Terms and
Abbreviations
Description
Automatic return Function that allows the modules that have been disconnected from the data link due to
the power off to automatically reconnect to the data link when they return to the normal
status.
Number of occupied stations • For the CC-Link system, the number of I/O points of bit data per station is 32 points
and the number of I/O points of word data per station is 4 points.
• Each slave station must occupy the number of stations according to the information
amount transmitted from/to other stations. This is called "Number of occupied
stations".
• The following shows the occupied station numbers of each slave station module
connected to the CC-Link system:
For the local modules, the users can decide the occupied station numbers (1 to 4
stations) that correspond to the number of points necessary for the information
transmission with other stations.
Remote I/O station occupies only one station.
For the remote device station and the intelligent device station that have a special
function, the occupied station numbers are set according to the information amount
transmitted with other stations.
Standby master station • Local station that enables the data link to continue working for the master station
when the master station cannot continue the data link due to a malfunction. (Backup
station for the master station. Refer to Section 1.1)
• Possesses the same function as the master station and operates as a local station
when the master station operates normally.
Number of module • Number of devices connected to the CC-Link physically.
• Set the number of slave stations connected to one CC-Link system to the "All connect
count" item of the network parameters for CC-Link.
Special function module Generic term of A and QnA series modules that are mounted on the base unit,
excluding the CPU module, power supply module and I/O module.
Transient transmission • Data communication function that communicates information between the master
module and the slave station (local station, intelligent device station) only when a
send request is made. (1:1 communication)
• Transient transmission can send/receive word data.
Bit information (bit data) • Bit unit information that expresses one data in 1 bit.
• Data status is expressed in 0 and 1 (or OFF and ON).
Master station • PLC CPU station on which the master module that manages the CC-Link system and
controls the data link, is mounted.
• One CC-Link system requires one master station.
• For the mater station, network parameter settings are required for the CC-Link
normally. (Refer to Chapter 3 and later for the setting details.)
• Station number for the CC-Link set to the master module which is connected to the
master station is 0.
• Cyclic transmission to all the slave station (N:N communication with local station is
also possible) and transient transmission to the local/intelligent device station can be
performed.
Master/Local module • Module that can be used as master module and local module.
(Set station number switches between master module and local module.)
• The following shows the master/local modules:
QJ61BT11N, AJ61BT11, A1SJ61BT11, AJ61QBT11, A1SJ61QBT11
Master module • Master/local module to be used by connecting to the master station of the CC-Link
system.
• The following shows the master/local modules that can be used as master module:
QJ61BT11N, AJ61BT11, A1SJ61BT11, AJ61QBT11, A1SJ61QBT11
Message Data to be sent/received by transient transmission.
Reserved station • Slave station that exists in the network parameters for CC-Link set to the master
station but that is not connected to the current CC-Link system. (Refer to Section 1.1)
(Slave station that will be connected to the CC-Link system in the future.)
• Reserved station is set in the network parameters for CC-Link.
• Setting the reserved station enables performing the data link without error occurrence.
(The data link to the reserved station is not performed.)
When the reserved station is not set, the corresponding station is treated as a data
link faulty station.