Watlow EZ-ZONE RM User Manual page 238

Example 4: Sharing Alarm Outputs with Or
In this example, in zone 1, Analog Input 1 provides
feedback for control Control Loop 1, Output 1 provides
heat as needed and Alarm 3 is active when Analog In-
put 1 deviates from the set point by than 4 degrees.
In zone 2, Analog Input 2 provides feedback to
Analog Input 1, Zone 1
A
Alarm 3, Zone 1
B
A
Alarm 1, Zone 2
B
Analog Input 2, Zone 2
Setup Menu Parameter
Analog Input 1 The analog input must be configured appropriately for the sensor. Assume for this example that the input if from a
thermocouple.
Control Loop 1 Source Function A
Source Instance A
The settings to utilize the sensor as feedback are listed above. However, the control loop must be configured appro-
priately for control.
Output 1 Output Function
Output Function Instance
Output Zone Source A
The output must be configured appropriately for control.
®
Wat lo w EZ-ZO N E R M S ys t e m
Control Loop 1, Zone 1
A
B
Deviation
A
B
B
C
Deviation
D
E
F
G
H
Control Loop 2, Zone 2
A
B
Setting
Analog Input
1
Heat Power
1
0
Control Loop 2, Output 3 provides heat as needed and
Alarm 1 is active when Analog Input 2 deviates from
the set point by more than 7 degrees.
Logic 1 in zone 1 evaluates the outputs of both
alarms with an Or function. If either or both alarms
are active, Output 1 in zone 2 turns on.
Power
Heat Power
Cool Power
Closed Loop Set Point
Open Loop Set Point
Logic 1, Zone 1
Or
Power
Heat Power
Cool Power
Closed Loop Set Point
Open Loop Set Point
Zone 1
Comment
Selects Analog Input 1 as feedback for the loop.
Selects the Heat Power output from Control
Loop 1 in the local zone to drive heating.
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235
Output 1, Zone 1
Output 1, Zone 2
Output 3, Zone 2
Chapter 10 A ppl ic a tions