Mitsubishi Electric GT1685 Connection Manual page 585

POINT POINT POINT
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
amplifier
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
amplifier)
• 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.
(a) Monitoring
• 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
0.
(b) Writing
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
servo amplifier.
(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
RAM.
For details, refer to the manual of the servo
amplifier used.
2
PROM of
2
PROM
2
PROM.
(2) MELSERVO-J2M-P8A
*2
Device name
Servo amplifier request
SP1
(SP)
Operation mode selection
OM0
(OM)
Basic parameter
PRM0
Expansion parameter
PRM1000 to
*1
(PRM)
Status display (ST) ST0
AL0
AL11
Alarm (AL) AL200
AL210
AL230
*3
DI0
External input (DI)
External output (DO) DO0
Forced output of signal pin
(for test operation) TMO0
(TMO)
*1 Use PRM0 to PRM29 when writing parameters to the servo
amplifier RAM.
PRM1000 to PRM1029 are used when writing parameters to
2
E PROM of the servo amplifier.
Use PRM1000 to PRM1029 when reading parameters to the
servo amplifier RAM.
*2 The GOT cannot read or write data from/to consecutive
devices.
*3 Only reading is possible.
POINT POINT POINT
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
switch.
(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
Device
No.
Setting range available
represent
ation
to SP2
to OM4
to PRM29
PRM1029
to ST2
to AL13
Decimal
to AL205
to AL215
to AL235
to DI2
to DO1
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