Hitachi LQE550 User Manual page 90

Replacement procedure
① Write down, on a piece of paper, the current settings of the rotary switches that are, as
shown below, accessible at the front side of the CPU LINK module to be replaced.
② Write down also the current settings of two switches, labeled LADDER (toggle switch)
and T/M (rotary switch), respectively, that are, as shown below, accessible at the front side
of the LPU module.
LPU
Power
RS-232C
supply
CPU
LINK
RS-232C cable
③ Connect the personal computer and the LPU module together with the RS-232C cable.
④ Start Hitachi's S10V CPU LINK system and write down the existing PCs edition
information on a piece of paper. (If the PCs edition information is not accessible, read it
from the "Change capacity" feature of Hitachi's S10V Ladder System.)
⑤ Set the LPU module's LADDER switch in STOP position and turn off the power supply of
the controller unit.
⑥ Remove the connecting cables from the CPU LINK module to be replaced.
⑦ Replace the existing CPU LINK module with the new one and set the new CPU LINK
module's rotary switches in the same way as you wrote down in Step ①.
⑧ Turn on the power supply of the controller unit. Then, check that the PCs edition
information is identical between the two CPU LINK modules, old and new, by using the
S10V CPU LINK system.
⑨ Turn off the power supply of the controller unit.
⑩ Remove the RS-232C cable from both the personal computer and LPU module, which
were connected together in Step ③.
⑪ Connect to the new CPU LINK module the connecting cables that you removed in Step
⑥.
⑫ Set the LPU module's LADDER and T/M switches in the same way as you wrote down in
Step ②.
LPU module's toggle and
rotary switches settings
LADDER
RUN STOP
T/M
RESET
ON OFF
6-3
6 MAINTENANCE
LQE550 CPU LINK module's
rotary switch settings
←
MAIN/SUB
← CPU No.