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7. AUXILIARY FUNCTION
7. AUXILIARY FUNCTION
7.1 Reading/writing parameters
The parameter data in the position board is accessed using the parameter read/write function. Types of
parameters include: system parameters, control parameters, and servo parameters. The parameter read/write
function can be used after system preparation completion (system status code: 0001h).
7.1.1 Writing parameters
1) 2) 3)
Dual port
memory
Parameter data
(internal memory)
Only when changing servo
parameters while system is
running
Servo
amplifier
Position board
processing
Parameter write
command (PWRT)
ON
OFF
Valid data
Valid data
Valid data
Valid data
User program
processing
Parameter write No.
Parameter write data
Parameter write
complete (PWFIN)
Parameter write No
(answer back)
Parameter write data
(answer back)
ON
OFF
Wait until the
parameter
write command
signal
(PWRT)
turns on.
The parameters are read
from the dual port memory
into the parameter data
area in the internal memory
(2) in Fig. 7.1) if parameter
is a servo parameter it is
transferred to the servo
amplifier
(3) in Fig. 7.1).
The number for the
parameter data
received and data to
be written are set in
the dual port memory.
parameter write
complete signal
(PWFIN) is turned on.
Wait until the
parameter write
command signal
(PWRT) is
turned off.
Turn off the
parameter write
complete signal
(PWFIN).
Parameter No. and
data for
parameter(s) to be
written are set in
the dual port
memory
(1) in Fig. 7.1).
Turn on the
parameter write
command signal
(PWRT) on the
dual port memory.
Wait until the
parameter write
complete signal
(PWFIN) on the
dual port memory
turns on.
Turn off the
parameter write
command signal
(PWRT) on the
dual port memory.
Position board
sscChangeParameter/sscChange2Parameter function
Host
controller
Fig. 7.1 Flow when data is written to parameters