Omron SYSDRIVE 3G3JV User Manual page 132

Communications
n72
RS-422/485 Parity Selection
Setting 0 to 2
range
Set Values
Value
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
Setting 10 to 65 (ms)
range
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
Setting 0, 1
range
Set Values
Value
0 Enabled
1 Disabled (Available to 1-to-1 RS-422 communication only)
Register 0148 Hex
Unit of 1
setting
Description
Register 0149 Hex
Unit of 1 ms
setting
Register 014A Hex
Unit of 1
setting
Description
Chapter 7
Changes during No
operation
Default setting 0
Changes during No
operation
Default setting 10
Changes during No
operation
Default setting 0
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