Scaling, Channel status – Rockwell Automation 1734-XXXX POINT I/O Digital and Analog Modules and POINTBlock I/O Modules User Manual
Page 102
Rockwell Automation Publication 1734-UM001E-EN-P - July 2013
104 POINT I/O Module Data
Scaling
Select scaling for each channel by making the selection on the configuration
dialog. Scaling is the conversion of unscaled data to engineering units.
The high and low scalers (Engineering Units) are signed integers. There are no
restrictions on these units.
•
Defaults for 1734-IE2C scalers are +3277 @ 4 mA for low
and +16,383 @ 20 mA for high.
•
Defaults for 1734-IE2V scalers are 0 @ 0V for low
and +10,000 @ 100V for high.
Set each scaler individually or on a per channel basis.
The 1734-IE2C module reads a current input between 0 or 4 mA (low) and
20 mA (high) dependent on mode selected. The 1734-IE2V module reads a
voltage input between -10V or 0V (low) and +10V (high) dependent on mode
selected.
Channel Status
•
Channel Fault Description - General channel health bit indicates whether
the module is operating with or without faults. If any alarms or faults are
detected, this bit is set. Channel Status can be read on a per channel basis
or by reading the Channel Status Byte (Bit 0) in the Module Produce
Assembly.
Produces (scanner Rx)
Input Channel 0 - High Byte
Input Channel 0 - Low Byte
Input Channel 1 - High Byte
Input Channel 1 - Low Byte
Status Byte for Channel 1
Status Byte for Channel 0
OR
UR
HHA
LLA
HA
LA
CM
CF
OR
UR
HHA
LLA
HA
LA
CM
CF
Consumes (scanner Tx)
No consumed data
Where:
CF = Channel Fault status; 0 = no error, 1 = fault CM = Calibration Mode; 0 = normal, 1 = calibration mode
LA = Low Alarm; 0 = no error, 1 = fault HA = High Alarm; 0 = no error, 1 = fault
LLA = Low/Low Alarm; 0 = no error, 1 = fault HHA = High/High Alarm; 0 = no error, 1 = fault
UR = Underrange; 0 = no error, 1 = fault OR = Overrange; 0 = no error, 1 = fault
Default Data Map for the 1734-IE2V Analog Input Module
Channel Status Byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Over
Range
Under
Range
High High
Alarm
Low Low
Alarm
High
Alarm
Low
Alarm
CAL
Mode
Channel
Fault