User Manual

Rockwell Automation Publication 1756-UM540A-EN-P - May 2014 185
Isolated Analog I/O Module Tag Definitions Appendix A
Ch[x].DigitalFilter INT Time Constant for a First Order Lag filter 0…32,767 ms
0 = default
Ch[x].RateAlarmLimit REAL Rate of change in Engineering Units/Second
If the absolute value of the change between samples
divided by the sample time exceeds this value, the
I.Ch[x].RateAlarm tag is sets.
Any positive value
0.0 = default (This value represents
no change between samples.)
Ch[x].LowSignal REAL Signal scaling value that lets you scale signal units (mV, Ω,
°F or °C) into Engineering Units.
Corresponds to the C.Ch[x].LowEngineering tag. That is,
this tag’s value is scaled to the lowest Engineering Unit.
Any value that is less than the
C.Ch[x].HighSignal tag value.
0 = default
Ch[x].HighSignal REAL Signal scaling value that lets you scale signal units (mV, Ω,
°F or °C) into Engineering Units.
Corresponds to the C.Ch[x].HighEngineering tag. That is,
this tag’s value is scaled to the highest Engineering Unit.
Any value that is greater than the
C.Ch[x].LowSignal tag value.
100.0 = default
Ch[x].LowEngineering REAL Low engineering scaling point
Corresponds to the C.Ch[x].LowSignal tag value.
0.0 = default
This value can correspond to signal
values in units or temperature.
Ch[x].HighEngineering REAL High engineering scaling point
Corresponds to the C.Ch[x].HighSignal tag value.
100.0 = default
This value can correspond to signal
values in units or temperature.
Ch[x].LLAlarmLimit REAL Low Low Process Alarm limit
Triggers the I.Ch[x].LLAlarm tag when the I.Ch[x].Data tag
value is less than this tag’s value.
0.0 = default
Ch[x].LAlarmLimit REAL Low Process Alarm limit
Triggers the I.Ch[x].LAlarm tag when the I.Ch[x].Data tag
value is less than this tag’s value
0.0 = default
Ch[x].HAlarmLimit REAL High Process Alarm Limit
Triggers the I.Ch[x].HAlarm tag when the I.Ch[x].Data tag
value is greater than this tag’s value.
100.0 = default
Ch[x].HHAlarmLimit REAL High High Process Alarm Limit
Triggers the I.Ch[x].HHAlarm tag when the I.Ch[x].Data
tag value is greater than this tag’s value.
100.0 = default
Ch[x].AlarmDeadband REAL Deadband that keeps Process Alarms triggered as long as
the I.Ch[x].Data tag value remains within the deadband of
the Process Alarm’s value
Any positive value
0.0 = default
Table 23 - 1756-IRT8I Module - Configuration Tags
Tag Name Size Definition Valid Values