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Technical Equipment
of TC600
Programmable Logic Controller
Supplement
July 1999
7
th
edition
1.1 Setting of CH1, CH2, CH3 serial communication
channels parameters
(extension of paragraph 4.5.1. of the basic manual)
Another parameter of CH1, CH2 and CH3 communication channels is
introduced for TC600 PLC starting with the 7.4 version system program
equipment. It is parity mode parameter. This parameter is set as the last
parameter of the given channel.
The support of the piggyback MR-14, MR-15 of 1.6 version and higher is
necessary for the CH3 channel moreover.
When setting the parity mode parameter the display shows the report of
this type:
which has the following meaning:
PAR - setting of parity mode
2
- number of set cannel
on
- parity switched on
Parity can be either switched on or off. In case of switched on parity it is
always even parity. By pressing of „SET„ key, setting is changed, by
pressing of „MODE„ the set value is stored and we pass to the following or
previous parameter setting.
Parity is standardly switched on. It is switched off only the cases of
necessity when it is necessary to communicate over modems, e.g., that do
not transmit parity. By switching parity off security of transmitted data is
decreased (for details see Serial communication of TECOMAT program-
mable logic controllers and TECOREG regulators, version 7 and higher,
order number TXV 001 06.02 handbook).
Parity mode is set only for PC and MAS modes.
Setting of the parity mode