Monitoring servo amplifier
Carefully read the manual of servo amplifier to be
connected and fully understand the operating
procedures before monitoring.
Before operation, check the parameter settings.
Improper settings may cause some machines to
perform unexpected operation.
The parameter settings must not be changed
excessively. Operation will be insatiable.
(1) Parameters with * in front of it's abbreviated name
For the parameter with * in front of it's abbreviated
name, powering off the servo amplifier after setting
then on makes the parameter valid.
(2) Data length for setting virtual devices for servo
Set the following data length for setting devices.
• PRM, ST, AL, PA, PB, PC, PD, POS, SPD, ACT,
DCT, DWL, AUX
: 16bits or 32bits (depends on the data of servo
• DI, DO, TMI, TMO, TMD: 32bits
If the above data length was not set, data would
not be set to the servo amplifier correctly or the
GOT can not monitor normally.
• When the 16-bit data is handled as 32-bit
data, the upper 16bits are displayed as 0.
• When the 32-bit data is handled as 16-bit
data, the lower 16bits only are displayed as
The GOT writes within the range of data
length set. Note that the servo amplifier
responds correctly while the written data is
invalid in the servo amplifier side when the
written data is outside the range of values
which can be set by the servo amplifier.
(3) Memory area for writing parameters
Parameters are written to RAM or E
(a) When written to RAM
Remember that written parameters are
cleared when power supply to the servo
amplifier is turned off.
(b) When written to E
Written parameters are not cleared even
when power supply to the servo amplifier is
turned off.However, there are limits in the
number of writing to E
If the data is frequently updated (more than
once in an hour), write the parameters to the
For details, refer to the manual of the servo
Servo amplifier request
Operation mode selection
Status display (ST)
External input (DI)
External output (DO)
Forced output of signal pin
(for test operation)
Use PRM0 to PRM29 when writing parameters to the servo
PRM1000 to PRM1029 are used when writing parameters to
PROM of the servo amplifier.
Use PRM1000 to PRM1029 when reading parameters to the
servo amplifier RAM.
The GOT cannot read or write data from/to consecutive
Only reading is possible.
Precautions for SP, OM, and TMO devices
(1) For bit devices
Only writing is possible.
[Alternate] of a bit switch cannot be used.
Use [Set], [Reset], and [Momentary] of a bit
(2) For word devices, double word devices
Only writing is possible.
Numerical input cannot be used.
When writing, use [Word Set] of a data set switch.
16. SERVO AMPLIFIER CONNECTION
16.6 Device Range that Can Be Set
Setting range available
16 - 21