Rockwell Automation 1734-IA2, User Manual

Page: 113 / 242

Publication 1734-UM001D-EN-P - April 2008
POINT I/O Module Data 111
Channel Indicator Behavior
See the table for a listing of channel indicator states for given module
conditions.
Analog Output Modules
The 1734-OE2C Analog Output Module is a two-channel module that
converts a digital code to an analog output current. The module resolution is
13 bits across 0…21 mA.
The 1734-OE2V Analog Output Module is a two-channel module that
converts a digital code to an analog output voltage. The module resolution is
14 bits across -10…+10V.
Data
The 1734-OE2C module operates in Unipolar mode; the 1734-OE2V module
operates in Unipolar or Bipolar modes. Data sent to the module is scaled by
the user to any 16-bit number. All data sent to the module is signed integer,
ranging from –32768…+32767 counts.
The 1734-OE2C module:
•
consumes 4 bytes of data (scanner Rx) in this format:
– Channel 0 Data (2 bytes)
– Channel 1 Data (2 bytes)
•
produces 2 bytes of data (scanner Tx) in this format:
– Channel 0 Status (1 byte)
– Channel 1 Status (1 byte)
Indication Probable Cause
Channel Status
Off Module in CAL mode
Solid green Normal (channel scanning inputs)
Flashing green Channel being calibrated
Solid red No power or major channel fault
Flashing red Channel at end of range
1734-IE2C module - (0 mA or 21 mA)
1734-IE2V module - (-0.25, -10.25, or +10.25)