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8.18 WATLOW Series 988 User’s Manual
General Software Features, Chapter 8
General Software
Remote Set Point
Requirements
Input 2 must be either a thermocouple (98_ _-_1_ _-_ _ _ _ ) or universal
signal conditioner (98_ _-_2_ _-_ _ _ _).
To use a Series 988 as a master controller, choose one of the retransmit
options for output 3 of the master (98_ _-_ _ _ _-M_ _ _ for 0-20mA or 4-
20mA; or 98_ _-_ _ _ _-N_ _ _ for 0-5VÎ (dc), 1-5VÎ or 0-10VÎ).
Overview
The remote set point feature allows the Series 988 to use a thermocouple,
RTD or process signal at input 2 to establish the set point. This feature
gives the Series 988 the ability to have its set point value manipulated by
an external source. A common application would use one ramping con-
troller with a set-point retransmit output to ramp multiple controllers
using the remote set point. Or you could use an analog output from a PLC
to send set point values to a Series 988.
You may select between local and remote set points at the front panel,
with an event input, from a remote computer using the communicatons
feature or from an external switch using an event input.
NOTE:
Make sure all input
and output
impedances are
compatible.
NOTE:
Input 1 and 2 are not
isolated from each
other.
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