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3 PROGRAMMING
3.1 Precautions for Programming
Program using redundant system function
■
When the own station is a redundant system
For a cyclic transmission program, replace the following target module labels with those for a redundant system.
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The method for checking the redundant system status of other stations
The following describes the method for checking the redundant system status of other stations on a network program that
contains a redundant system.
■
When a redundant master station configuration is used
Check the programming of when the submaster function is used. (
Page 171 Programming for when the submaster
Program using safety communication function
For a program using safety communication function, interlock with the safety special register described below. (For the 1st
master/local module)
• 'Safety refresh communication status of each safety connection (1st module)' (SA\SD1008 to SA\SD1015)
For a communication example using the safety communication function, refer to the following.
(
Page 173 Communication Example of Safety Communication Function, Page 187 Communication Example of Safety
Communication Function Used in Redundant Master Stations, Page 201 Communication Example of Safety Communication
Function Used in a Redundant Line)
Target module label
Module label for a redundant system
'Data link error status of each station' (SB00B0)
'Redundant system data link error status of each station' (SB01B0)
'Data link error status of master station' (SB00B1)
'Redundant system data link error status of master station' (SB01B1)
'Data link error status of station No.0' (SB00BF)
'Redundant system data link error status of station No.0' (SB01BF)
'Data link status of each station' (SW00B0 to SW00B7)
'Redundant system data link status of each station' (SW01B0 to SW01B7)
System configuration
Checking method
Existence of redundant system station
When there is a redundant system station on the network, 'Redundant system'
(Un\G24511.F) turns on. The station numbers of redundant system stations
can be checked with 'Redundant function information of each station'
(Un\G24504 to Un\G24511).
Existence of separate mode station
When there is a separate mode station on the network, 'Separate mode'
(Un\G24519.F) turns on. The station numbers of separate mode stations can
be checked with 'Separate mode status of each station' (Un\G24512 to
Un\G24519).
Existence of pairing-set station
When there is a pairing-set station on the network, 'Pairing-set station exists
information' (SB00D8) turns on. The station numbers of pairing-set stations
can be checked with 'Pairing setting status of each station' (SW00D8 to
SW00DF).
Existence of standby system CPU module
• When there is a standby system CPU module on the network, 'Station of
standby system exists information' (SB0118) turns on.
• The system status of the master station CPU module can be checked with
'Redundant CPU system status of the master station' (SB0119) or
'Redundant CPU system status of station No.0' (SB011A).
• The station number of the standby system CPU module can be checked
with 'Redundant CPU system status of each station' (SW0118 to SW011F).
Summary of Contents for MELSEC iQ-R04ENCPU
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