Omron SYSDRIVE 3G3JV

7-7
n72
RS-422/485 Parity Selection Register 0148 Hex Changes during
operation
No
Setting
range
0 to 2 Unit of
setting
1 Default setting 0
Set Values
Value Description
0 Even
1 Odd
2 No parity
In normal serial communications, data is configured in single bytes, and messages are created by
stringing together multiple bytes of data. The parity check described here sets the check for each byte of
data. Set the parity check method that is required by the Master.
Note The entire message is checked by a separate check code called “CRC-16,” so the communica-
tions data will be checked even if no special parity check is performed.
H Send Wait Time Setting (n73)
• Set this parameter to an awaiting period for returning a response after the DSR (data-send-request)
message is received from the Master.
n73
RS-422/485 Send Wait Time Register 0149 Hex Changes during
operation
No
Setting
range
10 to 65 (ms) Unit of
setting
1 ms Default setting 10
Set Values
• When the DSR message is received from the Master, the Inverter must wait for a communications time
of 24-bit length plus the set value in n73 before returning a response.
Set this value according to the response time of the Master.
H RTS Control Selection (n74)
• Select whether or not to enable the RTS (request-to-send) communications control function.
• This function can be disabled (i.e., set to “1”) only when a 1-to-1 Master/Slave configuration is used in
RS-422 communications. When multiple Slaves are used for RS-422, or whenever RS-485 commu-
nications are used, it is necessary to set “0” (enable RTS control).
n74
RS-422/485 RTS Control Selection Register 014A Hex Changes during
operation
No
Setting
range
0, 1 Unit of
setting
1 Default setting 0
Set Values
Value Description
0 Enabled
1 Disabled (Available to 1-to-1 RS-422 communication only)
Communications Chapter 7