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Chapter 3 Specifications and Functions
3.2.4 QD77MS common functions
The outline of the functions executed as necessary are described below.
(Refer to "Section 2" for details on each function.)
Common functions Details
Reference
section
Parameter initialization function
This function returns the "parameters" stored in the QD77MS
buffer memory/internal memory and flash ROM/internal memory
(nonvolatile) to the default values.
The following two methods can be used.
1) Method using sequence program
2) Method using GX Works2
14.2
Execution data backup function
This function stores the "setting data", currently being executed,
into the flash ROM/internal memory (nonvolatile).
1) Method using sequence program
2) Method using GX Works2
14.3
External signal selection function
This function is used to select the external input signal of
QD77MS, external input signal of servo amplifier or external
input signal via CPU (buffer memory of QD77MS) when using
the upper/lower limit signal and the near-point dog signal.
14.4
External I/O signal logic switching function
This function switches I/O signal logic according to externally
connected devices.
This function enables the use of the system that does not use b
(N.C.)-contact signals, such as Upper/lower limit signal, by
setting parameters to positive logic.
14.5
History monitor function
This function monitors errors, warnings, and start history of all
axes.
14.6
Amplifier-less operation function
This function executes the positioning control of QD77MS
without connecting to the servo amplifiers.
It is used to debug the program at the start-up of the device or
simulate the positioning operation.
14.7
Virtual servo amplifier function
This function executes the operation as the axis (virtual servo
amplifier axis) that operates only command (instruction) virtually
without servo amplifiers.
14.8
Mark detection function
This function is used to latch any data at the input timing of the
mark detection signal (DI1 to DI4).
14.9
Optional data monitor function
This function is used to store the data selected by user up to 4
data per axis to buffer memory and monitor them.
14.10
Module error collection function
This function collects errors occurred in the QD77MS in the PLC
CPU.
Holding the error contents in the PLC CPU, this function enables
to check the error history even after the PLC CPU in powered off
or reset.
14.11
Connect/disconnect function of SSCNET
communication
Temporarily connect/disconnect of SSCNET communication is
executed during system's power supply ON.
This function is used to exchange the servo amplifiers or
SSCNET
cables.
14.12
QD75MH initial value setting function
This function is used to set the factory-set initial value of
QD75MH for the setting data set in the QD77MS buffer
memory/internal memory and flash ROM/internal memory
(nonvolatile).
14.13
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