Instruction manual

91
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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.
∗ The slave does not respond to the command from the master when set to 0.
Monitoring run status from the PLC, setting/referencing of constants,
fault reset and multi-function input reference can be done regardless of
run command or frequency reference selection.
Multi-function input reference from PLC becomes OR with input
commands from S1 to S7 multi-function input terminals.
Constant Name Description
Initial
Setting
n003
Run command
selection
0 : operator
1 : control circuit terminals
2 : MEMOBUS communication
3 : communication card (optional)
0
n004
Frequency reference
selection
0 : potentiometer (digital operator)
1 : frequency reference 1 (n024)
2 : control circuit terminals (voltage 0 to 10V)
3 : control circuit terminals (current 4 to 20mA)
4 : control circuit terminals (current 0 to 20mA)
5 : pulse train
6 :
MEMOBUS communication (register No. 0002H)
7 : operator circuit terminals (voltage 0 to 10V)
8 : operator circuit terminals (current 4 to 20mA)
9 : communication card (optional)
0
n151
MEMOBUS
timeover detection
Monitors transmission
time between the
receiving the correct
data from the PLC.
(Timeover:2 sec)
0 : timeover detection (coast to a stop)
1 : timeover detection(decelerates to a stop
with speed reduction time 1)
2 : timeover detection(decelerates to a stop
with speed reduction time 2)
3 : timeover detection(continuous operation,
warning display)
4 : timeover detection not provided
0
n152
MEMOBUS
frequency
reference and
frequency
monitor unit
0 : 0.1Hz
1 : 0:0.1Hz
2 : 30000/100%
(30000 = max. output frequency)
3 : 0.1%
0
n153
MEMOBUS slave address Setting range:0 to 32
∗
0
n154
MEMOBUS BPS
selection
0 : 2400 bps
1 : 4800 bps
2 : 9600 bps
3 : 19200 bps
2
n155
MEMOBUS parity
selection
0 : even parity
1 : odd parity
2 : no parity
2
n156
Transmission wating
time
Setting limit:10 ms to 65 ms setting unit:1ms
10 ms
n157
RTS control
0 : RTS control
1 : no RTS control (RS-422A 1 to 1
communication)
0