6-2-10 Communications Writing - Omron E5C-T Series Communications Manual

6 Programless Communications
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-T, wire it, and then turn ON the power supply.
(2) Change all of the E5@C-T Controllers to the initial setting level and stop programless
communications.
(3) Set the Communications Unit No. parameter and Communications Baud Rate
parameter (57.6) in the new E5@C-T Controller and then return to the operation level.
For values other than the "Communications Unit No." and "Communications Baud Rate",
use the default values.
(4) Copy the parameter set values from the master to the new E5@C-T 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.
 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-T 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-T.
(5) Reverse the communications unit numbers of the temporary master and the new
E5@C-T.
(6) Return all of the slaves and the master in order to the operation level. This completes
the replacement.

6-2-10 Communications Writing

Writing can be enabled and disabled from the PLC. The Communications Writing parameter is normally
left ON (enabled). However, if it is necessary to change set values from the display section of the
E5@C-T in an emergency, temporarily change the setting to OFF (disabled). If you disable communica-
tions when writing is being performed from the PLC, an error will occur in the PLC. (An error code will
be set in the Response Flag in PLC memory.) If you cycle the power supply to the E5@C-T or move to
the initial setting level and then go back to the operation level, the Communications Writing parameter
will automatically change to ON.
6 - 18
communications unit
E5C-T Digital Temperature Controllers Programmable Type Communications Manual (H186)
number 1, and then temporarily change the