Watlow D4T Data Logger
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Chapter 5 Function Reference
Tolerance
Use Tolerance to set how precisely A and B must match to be considered equal. For example,
with Tolerance set to 2, the values 10 and 12 are considered equal, but 10 and 12.5 are not.
Range: 0 to 99,999
Error Handling
When an error exists on any receiver, the function cannot definitively determine the result of
the comparison and an error will be generated. Use Error Handling to select the output's value
and error status.
Options:
• True Good
: outputs value is true (on) with no error
• True Bad
: outputs value is true (on) and has an error
• False Good
: outputs value is false (off) with no error
• False Bad
: outputs value is false (off) and has an error
Not Equal To
The output (T/F) is on when recievers A and B are not equal to each other. See Tolerance.
Signals
Direction
Label
Type
Function
Receiver
A
Analog Signal to be compared to B
B
Analog Signal to be compared to A
Transmitter
T/F
Digital On when A and B are not equal and within tolerance, other-
wise off
Function
To test if A and B are not equal to each other, set Function to Not
Equal To
.
Tolerance
Use Tolerance to set how precisely A and B must match to be considered equal. For example,
with Tolerance set to 2, the values 10 and 12 are considered equal, but 10 and 12.5 are not.
Range: 0 to 99,999
Error Handling
When an error exists on any receiver, the function cannot definitively determine the result of
the comparison and an error will be generated. Use Error Handling to select the output's value
and error status.
Options:
• True Good
: outputs value is true (on) with no error
• True Bad
: outputs value is true (on) and has an error
• False Good
: outputs value is false (off) with no error
• False Bad
: outputs value is false (off) and has an error
