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7. AUXILIARY FUNCTION
7.1.2 Reading parameters
Dual port
memory
Parameter data
(internal memory)
Servo
amplifier
1)2)
Position board
Wait until the
parameter read
command
signal (PRD)
turns on.
The parameters are read
from the internal memory
area into the 2 port memory
(1) in Fig. 7.2).
Wait until the
parameter read
command
signal (PRD) is
turned off.
Turn off the
parameter read
complete signal
(PRFIN).
Position board
processing
Parameter read
command (PRD)
ON
OFF
Valid data
Valid data
Valid data
Turn on the
parameter read
command signal
(PRD) on the dual
port memory.
Parameter No. for
parameter(s) to be
read are set in the
dual port memory.
User program
processing
Wait until the
parameter read
complete signal
(PRFIN) on the
dual port memory
turns on.
After reading the
parameter(s) from the
dual port memory,
turn off the parameter
read command (PRD)
on the dual port
memory. (2) in Fig.
7.2)
Parameter read No.
Parameter read
complete (PRFIN)
Parameter read No
(answer back)
Parameter read
data
ON
OFF
The Number for the
parameter received is
set in the dual port
memory.
Parameter read
complete signal
(PRFIN) is turned on.
Host
controller
sscCheckParameter/sscCheck2Parameter function
Fig. 7.2 Flow when data is read from parameters
POINT
Two parameters can be read at a time. When reading one parameter, set 0 to
the other parameter.
If an erroneous parameter number is set, a parameter number error
(PR ENn (n
1 to 2)) turned on. However, the parameter number. 0 is not
considered an erroneous parameter number.
In system parameter read, parameter read command (SPRD), parameter
read access complete (SPRFIN) and parameter number error
(SPRENn (n
1 to 2)) are used.