6 Programming Features
155
* Communications error contents are saved until Fault Reset is input.
(Reset is enabled during run.)
 Storing Constants [Enter Command] (can be written only.)
When a constant is written from the PLC by communications, the con-
stant is written to the constant data area on the RAM in the V7AZ. The
Enter Command is a command to write the constant data on the RAM to
the non-volatile memory in the V7AZ. This Enter Command is exe-
cuted when data, regardlesss of the value, is written to register number
0900H. With the factory setting, an Enter Command is accepted only
while the Inverter is stopped. By changing constant n170, an Enter
Command can be accepted even while the Inverter is running.
While the constant is being stored after an Enter Com-
mand was issued, response to the commands or data
input with the keys on the Digital Operator (JVOP-140)
becomes poor. Be sure to take some measures for an
emergency stop by using the external terminals (setting
the external terminal to Run Command priority, or set-
ting the multi-function input terminal to external fault,
External Baseblock or emergency stop).
Maximum number of writing times of the non-volatile mem-
ory used for V7AZ is 100,000; do not execute the Enter Com-
mand excessively.
When a constant is changed from the Digital Operator, the constant data
on the RAM is written to the non-volatile memory without the Enter
Command.
Register
No.
Name Contents Setting
Range
Factory
Setting
0900H Enter
Command
Write in constant data to non-
volatile memory (EEPROM)
0000H to
FFFFH
-
Constant
No.
Name Unit Setting
Range
Factory
Setting
n170 Enter Command opera-
tion selection (MEMOBUS
communications)
-0, 1 0
CAUTION
NOTE
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