YASKAWA V7 Technical Manual page 69

5.14 MODBUS CONTROL
C. Sending/Receiving Data
Data that can be sent and received are run/stop commands, frequency reference, fault reset, drive
status, and setting and reading of parameters.
n003 : Operation Method Selection
Parameter n003 selects where the run/stop commands (sequence) will come from. To be able to pro-
vide a run command over the Modbus serial communications link, set this to a data of "2."
n004 : Reference Selection
Parameter n004 selects where the frequency reference will come from. To be able to provide a fre-
quency reference over the Modbus serial communications link, set this to a data of "6."
n050 thru n056 : Multi-function Inputs
Selects operation by serial communication or by external terminal. If the status of this command input
is changed while the drive is running, the selection is ignored until the next time the drive is stopped.
Open : Run according to the setting of Operation Method Selection (n003) and
Closed : Run by frequency reference and run command from serial
EXAMPLE:
TERMINAL S6 Open:
TERMINAL S6 Closed: Frequency reference and run command from serial
Continued
(Term. S2-S6)
Reference Selection (n004).
communication.
n003 setting is " 1 ", and n004 setting is " 2 ".
n056 = 18.
Frequency reference from control circuit terminal FR
and run command from control circuit terminals S1, S2.
communication.
Data 18: Serial communication/
5-17
Factory setting: 0
Range: 0 to 2
Factory setting: 0
Range: 0 to 6
Digital Operator