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E6581315
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8. Commands and monitoring from the computer
Across the network, instructions (commands and frequency) can be sent to each inverter and the
operating status of each inverter can be monitored.
8.1. Communication commands (commands from the computer)
Communication command (Communication number: FA00, FA04)
Commands can be executed on inverter frequencies and operation stop through communication.
The VF-AS1 series can enable command and frequency settings through communication irrespec-
tive of settings of the command mode selection () and frequency setting mode selection 1
(). However, if “48 (49): Forced switching from communication to local,” “56 (57): Forced
continuous operation,” or “58 (59): Specified speed operationj” is set by input terminal function se-
lection ( to ), a change to a command other than communication and to a frequency
command is feasible through a contact on the terminal board.
Once the communication command (FA00, FA04) is set to enable communication command priority
and frequency priority, both priorities will be enabled unless OFF is set, power is turned off or is re-
set, or factory default setting () is selected. Emergency stop is always enabled even though
communication command priority is not set.
Table 1 Data construction of communication commands (communication number: FA00, FA04)
bit Specifications 0 1 Remarks
0 Preset speed operation
frequencies 1
1 Preset speed operation
frequencies 2
2 Preset speed operation
frequencies 3
3 Preset speed operation
frequencies 4
Preset speed operation is disabled or preset
speed operation frequencies (1-15) are set by
specifying bits for preset speed operation frequen-
cies 1-4.
(0000: Preset speed operation OFF,
001-1111: Setting of preset speed operation
frequencies (1-15))
4 Motor selection (1 or 2)
(THR 2 selection)
Motor 1
(THR 1)
Motor2
(THR2)
THR1 :
THR2 :
5 PI control Normal operation PI OFF
6 Acceleration/deceleration
pattern selection (1 or 2)
(AD2 selection)
Accelera-
tion/deceleration pattern
1 (AD1)
Accelera-
tion/deceleration pattern
2 (AD2)
AD1 : ,
AD2 : ,
7 DC braking OFF Forced DC braking
8 Jog run OFF Jog run
9 Forward/reverse run se-
lection
Forward run Reverse run
10 Run/stop Stop Run
11 Coast stop command Standby Coast stop
12 Emergency stop OFF Emergency stop Always enabled, “E” trip
13 Fault reset OFF Reset
No data is returned from the inverter.
14 Frequency priority selec-
tion
OFF Enabled Enabled regardless of the set-
ting of
15 Command priority selec-
tion
OFF Enabled Enabled regardless of the set-
ting of
Note: The acceleration/deceleration change command OR with Bit 8 and 9 of Communication num-
ber FA20 and FA22.
Ex.: Forward run command used in two-wire RS485 communication (PFA008400) CR
1 is specified for bit 15 (communication command: enabled) and bit 10 (operation command).
BIT15 BIT0
1000010000000000
Ex.:
Reverse run command used in two-wire RS485 communication (PFA008600) CR, (PFA00C600) CR
8600H : To disable frequency instructions from the computer
C600H : To enable also frequency instructions from the computer
FA00:
0048