Omron SYSMAC CP Series, User Manual

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14 Serial Communications
14-52
CP2E CPU Unit Software User’s Manual(W614)
14-8 Precautions on the usage of RS-485
When using 2-wire RS-4 8 5 with the built-in RS-4 8 5 of the S -type CPU Unit, or the RS422A/4 8 5
Option Board CP1W-CIF11/CIF12-V1 and CP2W-CIFD2/CIFD 3 Option Board with two ports, pay atten-
tion to the following precautions and construct application.
When using the RS-4 8 5 (2-wire), it can only communicate in half duplex.
Please secure the waiting time shown below till the next data transmission after the remote device
receives data from CP2E. If the receive data are transmitted from the remote device within the waiting
time shown below after CP2E data transmission, the data may not be received by CP2E.
Remote device
CP2E
S end d a t a
S end d a t a
S end d a t a
S ec u re the w a iting time s hown b elow till the next d a t a
tr a n s mi ss ion a fter the d a t a reception from CP2E.
B au d r a te
9600 to 115200 b it/ s :1m s min.
1200 to 4800 b it/ s :3m s min.