Communications Writing - Omron E5CC Communications Manual

6 Programless Communications
Note: 1 If you cycle the power supply to the E5@C Controllers after the error occurs, perform procedure "a" given
above.
2 If you cannot solve the problem with the above flowchart or if the situation becomes too confusing, cycle
the power supply to all of the E5@C Controllers and then perform procedure "a" given above to copy the
parameter settings to all of the slaves.
Copying Procedure When Replacing a Controller
 Replacing a Slave (i.e., a Controller with a Communications Unit Number
Other Than 0)
(1) Replace the E5@C, wire it, and then turn ON the power supply.
(2) Change all of the E5@C Controllers to the initial setting level and stop programless
communications. The above step is not required for component communications.
(3) Set the Communications Unit No. parameter and Communications Baud Rate
parameter (to 19.2 for a Mitsubishi FX1 or FX2 PLC, 38.4 for a Mitsubishi FX3 PLC,
and 57.6 for any other PLC) in the new E5@C Controller and then return to the
operation level.
(4) Copy the parameter set values from the master to the new E5@C Controller by
specifying the number of the Controller.
(5) Return all of the slaves and the master in order to the operation level. This completes
the replacement. The above step is not required for component communications.
 Replacing the Master (i.e., the Controller with a Communications Unit
Number of 0)
To copy the parameter settings, one of the slaves will function as the master, which means that the
No. 0 Upload Area and the No. 1 Upload Area will temporarily change in PLC memory. Turn OFF
the power supply to the PLC or otherwise make sure that the system will not be adversely affected
before you perform the following procedure.
(1) Perform steps 1 and 2 in the above procedure.
(2) Record the communications unit number and communications baud rate of the slave
with
communications unit number to 0 (master). Do not return to the operation level after
you change the communications unit number.
(3) Set the Communications Unit No. parameter and the Communications Baud Rate
parameter of the new E5@C to the values that you recorded, and then change to the
operation level.
(4) Copy the parameter settings from the temporary master, specifying the
communications unit number of the new E5@C.
(5) Reverse the communications unit numbers of the temporary master and the new
E5@C.
(6) Return all of the slaves and the master in order to the operation level. This completes
the replacement. The above step is not required for component communications.

6-2-10 Communications Writing

Writing can be enabled and disabled from the PLC (or, for component communications, from the E5@C
master). The Communications Writing parameter is normally left ON (enabled). However, if it is neces-
sary to change set values from the display section of the E5@C in an emergency, temporarily change
the setting to OFF (disabled). If you disable communications when writing is being performed from the
6 - 16
communications unit number 1, and then
E5@C Digital Temperature Controllers Communications Manual (H175)
temporarily change the