User`s manual

95
Inverter Settings Chapter 7-2
Set Values
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 communications data will be checked even if no special parity check is
performed.
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.
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.
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-422A communications. When multiple
Slaves are used for RS-422A, or whenever RS-485 communications are
used, it is necessary to set “0” (enable RTS control).
Set Values
n72 RS-422A/485 Parity Selection Register 0148 Hex Changes during
operation
No
Setting
range
0 to 2 Unit of
setting
1 Default setting 2
Value Description
0Even
1Odd
2 No parity
n73 RS-422A/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
n74 RS-422A/485 RTS Control
Selection
Register 014A Hex Changes during
operation
No
Setting
range
0, 1 Unit of
setting
1 Default setting 0
Value Description
0 Enabled
1 Disabled (Available to 1-to-1 RS-422A communication only)