User`s manual

4-3
4.1 Device Memory
INP-TN5A0202-E
4.1
Device Memory
The programless communication module operates as the master of the communication between PLC and the module, and
reads outs/ writes PLC device memory according to the programless communication module parameters’ setting.
Only accessing to this device memory enables PLC to monitor or set the data of the module type temperature controller
connected to the programless communication module.
Hereinafter, the communication between a programless communication module and PLC-module will be also referred as to “the
programless communication”.
Temperature
control module
St.32
(Connectable max.
units)
Temperature
control module
St.1
Read out data from each temperature control module
Writing data to each temperature control module
PLC
Device memory
PLC Control
Monitor area
System field
Data field
Setting area
Field
Monitor area
Field
Set value
Setting area
System field
Data field
Command demand
Writing set value
Monitor value
Set value
Monitor value
Reading set/monitor value Reading set value
Programless
communication
module
Command response
PLC does not need the ladder program for communications, since the programless communication module updates the device
memory data automatically with the programless communication function.
PointPoint