Rockwell Automation 1771-OFE/B Analog Output Module User Manual - Manual (Page 18)

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Publication 1771Ć6.5.30 - November 1998
This is a significant safety feature. You can choose to have the
module’s outputs go to the maximum, minimum, or middle of their
respective ranges or hold their last state if a module or system fault
occurs or if the system processor changes from RUN to PROG
mode.
You do this by placing the LAST STATE configuration jumpers on
eight (four jumpers on sets of pins) of the stake pins marked MAX,
MIN, MID on the module’s circuit board (Figure 2.1). If you do not
place configuration jumpers in one of these positions, the module
defaults to the HOLD LAST VALUE setting.
Figure 2.1 shows jumper positions for the 1771-OFE, Series B,
Analog Output Module LAST STATE Configuration Jumpers.
Important: Ignore the MAX, MIN, MID markings on the printed
circuit board.
Important: On power-up, the module’s output is disabled until the
module receives the first block transfer write. The
output then enables with the value that you send it in
the block transfer write block.
Important: We ship 1771-OFE modules with the LAST STATE
configuration jumpers in the MID position.
!
ATTENTION: Switch 1 of the I/O rack affects the
function of the configuration settings as indicated in
the table below.
Rack Switch 1
Configuration Jumper Setting
Setting
MIN MID MAX HOLD LAST STATE
Last State Last State Last State Last State Last State
Reset Min Mid Max Last State