User`s manual

5-14 INP-TN5A0202-E
5.3 PLC Communication Setting
Setting for PLC communication starting time
Setting for the waiting time until starting programless communications to the PLC after turning the programless communication
module’s power on.
Refer to the parameters below.
Parameter Setting Range Unit
Factory-set
value
Attribute
MODBUS register No.
(Relative Address)
PLC communication
starting time
1 to 255 Sec. 1 R/W 40005 (0004h)
Note
After turning the programless communication module’s power on, it takes about 5 to 30 seconds to start communications.
If setting the time less than that the programless communication module needs to start communication to the “PLC
communication starting time” parameter, the communication with the PLC does not be started within the starting
communication time. (Required time to start communication after turning the power on is according to number of the module
type temperature controllers connected to the programless communication module.)
When connecting a module temperature control system with the maximum confi guration, it takes about 30 seconds until
PLC starts a communication.
During 1:N connection, until the module which St. No. is "0" starts a communication with PLC, other modules which St. Nos.
are not "0" are in the standby state.
PLC communication inter-cycle setting
Setting the communication inter-cycle between the programless communication module and the PLC
Refer to the parameters below.
Parameter Setting Range Unit
Factory-set
value
Attribute
MODBUS register No.
(Relative Address)
PLC communication
inter-cycle time
0 to 5000 ms 100 R/W 40004 (0003h)
Reading out from the PLC setting area and updating of the monitor area is executed at the inter-cycle set here.
Actual time taken for a communication can be confi rmed by the “Inter-PLC communication execution time monitor” parameter.
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If the communication has not been performing within the value of the “PLC communication inter-cycle time” parameter,
number of the over times is stored in the “PLC communication inter-cycle time overtime counter” parameter.
When using 1:N connection, the settings of every connected programless communication modules should be the same.
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