Allen-Bradley 1734-OB2, Руководство пользователя, Страница: 106 / 221

Rockwell Automation Publication 1734-UM001E-EN-P - July 2013
108 POINT I/O Module Data
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)