
3. PERIPHERAL EQUIPMENT CONTROL
B--65245EN/02
HANDLING
88
When using the peripheral equipment control parameter rewrite function,
specify 12 as function code, a data size as command data 1, a parameter
number and parameter value as command data 2, and start operation with
the ST signal. For a double--word parameter, specify a parameter value
twice. Parameter rewrite operation is performed in the emergency stop
state. However, if operation is not being performed, the following
parameter can be rewritten in a state other than the emergency stop state:
S Parameter No. 20
CAUTION
The number of times the memory (EEPROM) for holding
parameters can be rewritten to is limited (to several ten
thousands times), so the memo ry does not allow frequent
rewriting. For an application that rewrites parameters
frequently, bit 3 (NEPRM) of parameter No. 4 needs to be
set to 1 to modify RAM data only without writing to the
EEPROM.
The system configuration is shown below.
Ladder
Host (NC)
FANUC I/O Link
Servo amplifier unit
Peripheral equipment
control
In the configuration above, the host issues a ladder--based command to
peripheral equipment control via the FANUC I/O Link to control the
servo amplifier unit. With the parameter rewrite function, the servo
amplifier unit receives command data for parameter rewrite operation,
then executes parameter rewrite operation with the ST signal (automatic
operation start signal).
3.4.8
Rewriting of
Parameters
3.4.8.1
Overview
3.4.8.2
System config u ration