B873-002 and B875-002 Switch Settings and Indicators
(Original Document)
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Switch Settings
There is a DIP switch located at the rear of the module. Switches 1 and 2 are not used. Switch 3 can be set to either module reset or module run. It must set to the module run position for the module to operate. Switch 4 is used to set which data value range the module will produce. Select either normal range or elevated range. Make sure you set Switch 3 and 4 before inserting the module into the housing. Refer to the figure below for a key to setting the DIP switch.
Indicators
The Active, Over Range, Under Range indicators are located on the front panel of the module. The Over Range and Under Range indicators are shared by all of the module's input channels. The module's status can be determined by referring to the table below.
The following table gives the Indicator readings for the B873-002 and B875-002 modules:
Indicator
State
Condition
Active
on
blinking
off
The module is communicating properly and PLC is running
The module failed the powerup reference test
The module failed the internal diagnostic test/PLC is not in Run mode/communication from PLC to module has failed
Over Range
off
on or flickering
All input are within the valid input range
One or more inputs have exceeded the valid input range
Under Range
off
on or flickering
All input are within the valid input range
One or more inputs have dropped below the valid input range