14 Serial Communications
14-28
CP1E CPU Unit Software User’s Manual(W480)
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.
Wiring Example (CP1E N30/40 CPU Units)
CP1W-CIF11 RS422/485 Option Board DIP Switch Settings
14-5-5 Example Application
Operation
No. Settings
Polling
Unit
Polled
Unit No. 0
Polled
Unit No. 1
Description
1 Terminating resistance selection ON OFF ON PLCs at both ends must have ter-
minating resistance connected.
2 2-wire or 4-wire selection ON ON ON 2-wire
3 2-wire or 4-wire selection ON ON ON 2-wire
4 − OFF OFF OFF Always OFF
5 RS control selection for RD OFF OFF OFF Control disabled
6 RS control selection for SD ON ON ON Control enabled
Boiler A Boiler B Boiler C
Boiler A: CP1E (Polling Unit)
CP1E N-type
CPU Unit
CP1E N-type
CPU Unit
CP1E N-type
CPU Unit
CP1W-CIF11
RS-422A/485
Option Board
CP1W-CIF11
RS-422A/485
Option Board
CP1W-CIF11
RS-422A/485
Option Board
CP1W-TS101
Temperature
Sensor Unit
CP1W-TS101
Temperature
Sensor Unit
CP1W-TS101
Temperature
Sensor Unit
Two Pt100 Sensor Inputs Two Pt100 Sensor Inputs Two Pt100 Sensor Inputs
CIO 2, CIO 3 CIO 2, CIO 3 CIO 2, CIO 3
Boiler B: CP1E (Polled Unit No. 0) Boiler C: CP1E (Polled Unit No. 1)
CPU Unit connector
DIP switch for operation
settings
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