Restrictions - Mitsubishi Electric MELSEC Q Series Programming Manual

1 OVERVIEW

1.5 Restrictions

There are following restrictions to use this function.
(1) Install Q173DSXY into the main base unit.
It cannot be used on the extension base unit.
(2) Q173DSXY is controlled by PLC CPU.
Q173DSXY can be connected to only Motion CPU (CPU No.2) in the Multiple
CPU system. Do not connect Q173DSXY to Motion CPU (CPU No.3 or No.4). The
safety observation functions cannot be executed in Motion CPU (CPU No.3 or
No.4).
(3) Some devices are used for safety observation process in the system. These
devices cannot be used in user programs.
(4) When a sequence program for safety observation is not stored in PLC CPU at the
initial start-up, the sequence programs for safety observation is transferred from
Motion CPU to PLC CPU. If PLC CPU starts running before completion of transfer,
an error will occur in PLC CPU. Turn the power ON again or reset the PLC CPU.
(5) Communication between Motion CPU and GX Developer/GX Works2 can be
executed when the safety observation function parameters are set in the Motion
CPU and the rotary switch (SW2) at the front side of CPU is changed to "1". Make
sure to set the safety observation function parameters in the Motion CPU before
communication.
(6) MT Developer2 is required for safety observation settings in Motion CPU.
MT Developer cannot be used.
(7) Instructions, device range and program capacity of sequence programs in Motion
CPU differ from those of Q series PLC CPU. Confirm the instructions, device
range and program capacity before creating the program.
(8) Available functions in GX Developer/GX Works2 when sequence programs are
created in Motion CPU differ from those of Q series PLC CPU. Confirm the
available functions before creating the program.
(9) A safety encoder, or external auxiliary pulse input is required for monitoring when
the motor is stopped. The external auxiliary pulse input must be defined according
to the input specification of the safety signal module (Q173DSXY).
(10) Speed monitoring (SLS) and Standstill monitoring (SOS) cannot be executed in
amplifier-less operation. Safety observation error will occur because there is no
motor encoder feedback and external auxiliary pulse input.
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