6. Programming Features
111
Procedure for Communications with PLC
The following shows the procedure for communications with PLC.
1. Connect the communication cable between the PLC and the VS-
606V7 with the power supply turned OFF.
2. Turn the power ON.
3. Set the constants (n151 to n157) required for communication by
using the Digital Operator.
4. Turn the power OFF once to verify that the Digital Operator displays
have been completely erased.
5. Turn the power ON again.
6. Communications with the PLC starts.
Setting Constants Necessary for Communication
Communication related constants must be set for PLC communication.
Constants n151 to n157 cannot be set by communication. Always set
them before performing communication.
Constant
Name
Description
Factory
Setting
n003
Run Command
Selection
0: Digital Operator
1: Control circuit terminals
2: MEMOBUS communications
3: Communications card (optional)
0
n004
Frequency Refer-
ence Selection
0: Potentiometer (Digital Operator)
1: Frequency reference 1 (n024)
2: Control circuit terminals (voltage 0 to 10 V)
3: Control circuit terminals (current 4 to 20 mA)
4: Control circuit terminals (current 0 to 20 mA)
5: Pulse train
6: MEMOBUS communication (register No. 0002H)
7: Operator circuit terminals (voltage 0 to 10 V)
8: Operator circuit terminals (current 4 to 20 mA)
9: Communication card (optional)
0
n151
MEMOBUS
Timeover Detec-
tion Monitors
Transmission
Time between the
Receiving the
Correct Data from
the PLC.
(Timeover: 2 s)
0: Timeover detection (coast to a stop)
1: Timeover detection (decelerates to a stop with
speed deceleration time 1)
2: Timeover detection (decelerates to a stop with
speed deceleration time 2)
3: Timeover detection (continuous operation, warning
display)
4: Timeover detection not provided
0
n152
MEMOBUS
Frequency
Reference and
Frequency
Monitor Unit
0: 0.1 Hz
1: 0.01 Hz
2: 30000/100 % (30000=max.output frequency)
3: 0.1 %
0