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Parameter
Definition
Number
CR•LF
instruction
124
presence/
absence
Operation
338*2
command
right
Speed
339*2
command
right
Link start
340*2
mode
selection
2
E
PROM
342
3
write
*
selection
*1. When the communication option is fitted, NET mode communication cannot be used if "100, 101, 110 or
111" is set in Pr. 119.
*2. Made valid when "100, 101, 110 or 111" is set in Pr. 119.
*3. When you have set write to RAM, powering off the inverter clears the parameter values that have been
changed. Therefore the parameter values available when power is switched on again are those stored
2
previously in E
PROM.
When the parameter values will be changed frequently, set "1" in Pr. 342 to choose write to RAM.
2
The Pr. 342 " E
PROM write selection" setting is also valid when the communication option is fitted.
<Computer programming>
(1) Communication protocol
Data communication between the computer and inverter is performed using the
following procedure:
Computer
↓ (Data flow)
Inverter
Inverter
↓ (Data flow)
Computer
*1. If a data error is detected and a retry must be made, execute retry operation with the user
program. The inverter comes to an alarm stop if the number of consecutive retries
exceeds the parameter setting.
*2. On receipt of a data error occurrence, the inverter returns "reply data 3)" to the computer
again. The inverter comes to an alarm stop if the number of consecutive data errors
reaches or exceeds the parameter setting.
Setting
0
Without CR/LF
1
With CR, without LF
2
With CR/LF
0
Computer
1
External
0
Computer
1
External
0
Depends on Pr. 79 setting
NET mode communication (note that automatic
1
restart after instantaneous power failure is disabled.)
When parameter write is performed from the
0
computer, parameters are written to E
When parameter write is performed from the
1
computer, parameters are written to RAM.
Data read
*2
1)
2)
*1
Data write
123
PARAMETERS
Data Definition
4)
5)
Time
3)
2
PROM.
4
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