User Manual

Rockwell Automation Publication 1756-UM540A-EN-P - May 2014 179
Isolated Analog I/O Module Tag Definitions Appendix A
Ch[x].CalGoodHighRef BOOL Indicates that a valid High Reference signal has been
sampled on this channel.
• 0 = Valid High Reference signal
has not been sampled on this
channel
• 1 = Valid High Reference signal
has been sampled on this
channel
Ch[x].CalBadHighRef BOOL Indicates that an invalid High Reference signal has been
sampled on this channel.
You must correct this condition to successfully calibrate
the module.
If calibration is aborted with an invalid High Reference
signal, the I.Ch[x].CalibrationFault tag is set for this
channel until a successful calibration is performed.
• 0 = Invalid High Reference
signal has not been sampled on
this channel
• 1 = Invalid High Reference
signal has been sampled on this
channel
Ch[x].CalSuccessful BOOL Indicates calibration on this channel is complete and the
Calibrating state has been exited.
This tag remains set after valid calibration as long as
connection is open.
• 0 = Calibration was not
successful
• 1 = Calibration was successful
and calibrating state has been
exited.
Ch[x].RateOfChange REAL Change in channel data since last sample in
Engineering Units/Second.
Value representing the rate
of change
0.0 = default (This value indicates
no change occurred since sample.)
Ch[x].Data REAL Channel data in scaled Engineering Units. Any positive or negative value.
Determined by how you set the
scaling parameters on the channel.
For more information, see Scaling
on page 37.
Timestamp DINT[2] 64-bit timestamp indicating when all 8 channels were
last sampled in terms of CIPSync time.
CIPSync Timestamp data
RollingTimestamp DINT 16-bit timestamp that ‘rolls’ from 0…32,767 ms.
Compatible with existing PID/PIDE instructions to
automatically calculate sample deltas. With this module,
this PID/PIDE instruction uses the RPI because there is no
RTS available.
For more information on the Rolling Timestamp, see
page 21.
0…32,767 ms;
where 1 ms = 1 count
Table 21 - 1756-IF8I Module - Input Tags
Tag Name Size Definition Valid Values