
1.OVERVIEW OF PMC B-63983EN/02
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Table 1.1.3 lists the address symbols and corresponding signals.
Table 1.1.3 Address Symbols and signal types
Symbol Signal type
F Input signal from CNC to PMC (CNC → PMC)
G Output signal from PMC to CNC (PMC → CNC)
X Input signal from machine to PMC (MT → PMC)
Y Output signal from PMC to machine (PMC → MT)
R Internal relay
E Extra relay
A Message display
T Variable timer
C Counter
K Keep relay
D Data table
M Input signal from another PMC path
N Output signal to another PMC path
L Label number
P Subprogram number
(1) Addresses of signals between the PMC and CNC (F and G)
These addresses are assigned to interface signals between the
CNC and PMC. The relationships between the signals and
addresses are defined by the CNC.
F indicates an input signal from the CNC to PMC.
G indicates an output signal from the PMC to CNC.
(2) Addresses of signals between the PMC and machine (X and Y)
I/O signals exchanged with an externally connected machine can
be assigned to any addresses within an available range to control
the machine.
X indicates an input signal from the machine to PMC.
Y indicates an output signal from the PMC to machine.
(3) Addresses of internal relays and extra relays (R and E)
These addresses are used to temporarily store operation results
during sequence program execution processing.
Optionally, E addresses may be assigned to nonvolatile memory
locations.
The address locations of internal relays also include a reserved
area used by the PMC system software. The signals in the
reserved area cannot be written by sequence programs.
(4) Signal addresses for message display (A)
Instruction “DISPB” used in sequence programs include
instructions to display a message on the CNC screen. These
addresses are used by such instructions.