Communication 
 
FPΣ User's Manual 
234 
Operation mode relays 
•  For PLC link 0: R9070 to R907F (correspond to station nos. 1 to 16) 
•  For PLC link 1: R9090 to R909F (correspond to station nos. 1 to 16) 
The operation modes (RUN/PROG) can be checked for any given PLC. 
 
Relay no.  Station no.  System variable name  Conditions for TRUE/FALSE 
R9070 
1 sys_bIsPlcLink0Station1InRunMode 
R9071 
2 sys_bIsPlcLink0Station2InRunMode 
R9072 
3 sys_bIsPlcLink0Station3InRunMode 
R9073 
4 sys_bIsPlcLink0Station4InRunMode 
R9074 
5 sys_bIsPlcLink0Station5InRunMode 
R9075 
6 sys_bIsPlcLink0Station6InRunMode 
R9076 
7 sys_bIsPlcLink0Station7InRunMode 
R9077 
8 sys_bIsPlcLink0Station8InRunMode 
R9078 
9 sys_bIsPlcLink0Station9InRunMode 
R9079 
10 sys_bIsPlcLink0Station10InRunMode 
R907A 
11 sys_bIsPlcLink0Station11InRunMode 
R907B 
12 sys_bIsPlcLink0Station12InRunMode 
R907C 
13 sys_bIsPlcLink0Station13InRunMode 
R907D 
14 sys_bIsPlcLink0Station14InRunMode 
R907E 
15 sys_bIsPlcLink0Station15InRunMode 
R907F 
16 sys_bIsPlcLink0Station16InRunMode 
 
TRUE:  
•  if the unit is in RUN mode 
 
FALSE:  
•  if the unit is in PROG mode 
PLC link transmission error relay R9050 
This relay turns to TRUE if a problem is detected during transmission. 
 
Relay no.  Station no.  System variable name  Conditions for TRUE/FALSE 
R9050 
1–16 sys_bIsPlcLink0TransmissionError 
TRUE:  
•  if a transmission error has 
occurred in the PLC link, or  
•  if an error has occurred in the 
setting of the PLC link area 
 
FALSE:  
•  if there are no transmission 
errors