Toshiba VF-AS1, TOSVERT VF-AS1 P (50H) (RAM*1 write), R (52H) (Data read), G (47H) (Data read) , S (53 H)/ s (73 H) Inter-drive communication command(RAM*1 Write)

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 P (50H) (RAM*1 write)

This command is used to rewrite data into the parameter specified using a communication number.

It writes data into the RAM only. It cannot be used to write data into any read-only parameters. Each

time an attempt to write data is made the inverter checks whether the data falls within the specified

range. If this check reveals that the data falls outside the range, the inverter will reject it and return

an error code.

- Ex.: Entering the emergency stop command (communication number: FA00) from the computer

Computer → Inverter Inverter → Computer

(PFA009000)CR (PFA009000)CR …Command priority, emergency stop

command

Computer → Inverter Inverter → Computer

2F 50 FA 00 90 00 09 2F 50 FA 00 90 00 09

 R (52H) (Data read)

This command is used to read the setting of the parameter specified using a communication num-

ber.

- Ex.: Monitoring the electric current (communication number: FE03)

Computer → Inverter Inverter → Computer

(RFE03)CR (RFE03077B)CR …Current: 1915 / 100 = 19.15%

Computer → Inverter Inverter → Computer

2F 52 FE 03 82 2F 52 FE 03 07 7B 04

 G (47H) (Data read)

This command is used to read the parameter data specified using a communication number. Alt-

hough this command is used for the previous model to control the operation of two or more inverters

in binary mode through a two-wire RS485 network, the “R” command can also be used without

problems for the VF-AS1 series.

To use the “G” command, however, dummy data (2 bytes) is needed.

This command is available only in binary mode.

- Ex.: Monitoring the electric current (communication number: FE03)

Computer → Inverter Inverter → Computer

2F 47 FE 03 00 00 77 2F 47 FE 03 07 7B F9

* In this example, the data 00H sent from the computer to the inverter is dummy data.

 S (53 H)/ s (73 H) Inter-drive communication command(RAM*1 Write)

This command is for using frequency command values in % (1 = 0.01%), instead of in Hz, and is for

synchronous-proportional operation in inter-drive communication. This command can also be

used in ordinary computer link communication.

When writing in the frequency command (FA01, FA05) is enabled and a parameter other than it is

specified, a communication number error will result. Data is written in the RAM only and at this

time the data check such as an upper limit and lower limit checking is not carried out.

Data is not returned from the inverters while this command is used. This command can be used

only in the binary mode.

For the details of the format, see “6.2 Transmission format for inter-drive communication.”

Use (%) as the unit for frequency command values specified by the command S, instead of (Hz),

and the receiving side converts units for frequency values to “Hz” in accordance with the point con-

version parameter. The conversion formula is shown below.

Frequency command value (Hz) =

Point 2 frequency (F813) − Point 1 frequency (F812)

Point 2 (F814) − Point 1 (F811) x (Frequency command value (%)

− Point 1 (F811) + Point 1 frequency (F812)

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