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MELSEC-Q
16 COMMUNICATION BETWEEN CPU MODULES IN MULTIPLE PLC
SYSTEM
16.3 Interactive Communications between The High Performance model QCPU and Motion
CPU
16.3.1 Control commands from the High Performance model QCPU to the Motion CPU
It is possible to issue control commands from the High Performance model QCPU to
the Motion CPU, and read and write device data with the Motion dedicated PLC
instructions listed below.
(Control commands from Motion CPU to Motion CPU can not be used.)
Instruction name
Description
S.SFCS
SP.SFCS
Requests startup of the motion SFC program.
S.SVST
SP.SVST
Requests the start of operations for the servo program.
S.CHGV
SP.CHGV
Changes the speed of the axes during positioning and JOG operations.
S.CHGT
SP.CHGV
Changes the torque control value during operation and suspension when in
the real mode.
S.CHGA
SP.CHGA
Changes the current values of the halted axes, the synchronized encoder,
and the cam axes.
For example, it is possible to start up the Motion CPU's motion SFC from the High
Performance model QCPU with the S (P).SFCS instruction.
High Performance model QCPU
Motion SFC
Motion SFC
S.SFCS instruction
Startup
request
POINT
One High Performance model QCPU module can operate up to 32 " Motion
dedicated PLC instructions " and "communication dedicated commands between
multiple PLCs (omitting the S (P).GINT instruction)" at one time. However, if the
Motion dedicated PLC instructions and communication dedicated instructions
between multiple PLCs (omitting S (P).GINT instruction) are made at the same
time, the instructions will be executed in order from the first instruction accepted. If
there are 33 or more unexecuted instructions, an "OPERATION ERROR (error
code: 4107)" will be triggered.
REMARK
Refer to the Motion CPU Programming manual for details on and the necessity of
use of the motion only instructions.
Содержание QCPU (Q Mode)
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