FP
Σ
User's Manual
8.7 PLC Link
233
8.7.5 Monitoring
When using a PLC link, the operation status of the links can be monitored using the relays
below. In FPWIN Pro, choose
Monitor
→
Special Relays and Registers
→
PLC Link
Status
to view the status of each relay.
To monitor other PLC link status items, such as the transmission cycle time and the number of
times that errors have occurred, choose
Monitor
→
PLC Link Status
in FPWIN Pro.
Remote programming of other linked PLCs is not possible.
NOTE
To access special data registers and special internal relays, use the PLC-
independent system variables.
Transmission assurance relays
•
For PLC link 0: R9060 to R906F (correspond to station no. 1 to 16)
•
For PLC link 1: R9080 to R908F (correspond to station no. 1 to 16)
Before using the data from a different station in the network, check to make sure the
transmission assurance relay for this station is TRUE.
Relay no.
Station no.
System variable name
Conditions for TRUE/FALSE
R9060
1 sys_bIsPlcLink0Station1Active
R9061
2 sys_bIsPlcLink0Station2Active
R9062
3 sys_bIsPlcLink0Station3Active
R9063
4 sys_bIsPlcLink0Station4Active
R9064
5 sys_bIsPlcLink0Station5Active
R9065
6 sys_bIsPlcLink0Station6Active
R9066
7 sys_bIsPlcLink0Station7Active
R9067
8 sys_bIsPlcLink0Station8Active
R9068
9 sys_bIsPlcLink0Station9Active
R9069
10 sys_bIsPlcLink0Station10Active
R906A
11 sys_bIsPlcLink0Statio11Active
R906B
12 sys_bIsPlcLink0Station12Active
R906C
13 sys_bIsPlcLink0Station13Active
R906D
14 sys_bIsPlcLink0Station14Active
R906E
15 sys_bIsPlcLink0Station15Active
R906F
16 sys_bIsPlcLink0Station16Active
TRUE:
•
if the PLC link is normal
FALSE:
•
if transmission has been
stopped, or
•
if a problem has occurred, or
•
if a PLC link is not being used
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