Example Application - Omron CP1E CPU UNIT SOFTWARE User Manual

14 Serial Communications

14-5-5 Example Application

Operation
The present temperature information is exchanged between the boilers. This information is used to
adjust the temperature control of one boiler depending on the status of the other boilers and for moni-
toring individual boilers.
Boiler A Boiler B
Wiring Example (CP1E N30/40 CPU Units)
Boiler A: CP1E (Polling Unit)
CP1E N-type
CPU Unit
Two Pt100 Sensor Inputs
CP1W-CIF11
RS-422A/485
Option Board
CP1W-CIF11 RS422/485 Option Board DIP Switch Settings
(Back)
No.
1 Terminating resistance selection ON
2 2-wire or 4-wire selection
3 2-wire or 4-wire selection
4
5 RS control selection for RD
6 RS control selection for SD
14-28
Boiler C
Boiler B: CP1E (Polled Unit No. 0)
CP1W-TS101
CP1E N-type
Temperature
Sensor Unit
CPU Unit
CIO 2, CIO 3
CPU Unit connector
DIP switch for operation
settings
Polling
Settings
Unit
ON
ON
−
OFF
OFF
ON
CP1W-TS101
Temperature
Sensor Unit
CIO 2, CIO 3
Two Pt100 Sensor Inputs
CP1W-CIF11
RS-422A/485
Option Board
Polled Polled
Unit No. 0 Unit No. 1
OFF ON
ON ON
ON ON
OFF OFF
OFF OFF
ON ON
CP1E CPU Unit Software User's Manual(W480)
Boiler C: CP1E (Polled Unit No. 1)
CP1W-TS101
CP1E N-type
Temperature
Sensor Unit
CPU Unit
CIO 2, CIO 3
Two Pt100 Sensor Inputs
CP1W-CIF11
RS-422A/485
Option Board
Description
PLCs at both ends must have ter-
minating resistance connected.
2-wire
2-wire
Always OFF
Control disabled
Control enabled