
7. LADDER DIAGRAM FORMAT
B–61863E/15
PMC SEQUENCE PROGRAM
374
Addresses, signal names, comments, and line numbers must be inserted
into a ladder diagram to enable all users to easily read the ladder diagram.
Each address consists of an address number and a bit number, and it is
represented as follows.
Bit number (0 to 7)
Address number
(A numeric of 4 digits or less after an alphabetic character)
An alphabetic character is prefixed to the start of each address number to
represent the kinds of signals as shown in Table 7.1.1.
Table 7.1.1 Alphabetic symbols of address numbers
Symbol
Type of signal
X Input signal entered from machine tool to PMC (MT³PMC)
Y Output signal sent from PMC to machine tool (PMC³MT)
F Input signal entered from CNC to PMC (CNC³PMC)
G Output signal sent from PMC to CNC (PMC³CNC)
R Internal relay
E Extra internal relay
A Message display request
C Counter
K Keep relay
D Data table
T Variable Timer
L Label number
P subprogram number
7.1
ADDRESSES,
SIGNAL NAMES,
COMMENTS, AND
LINE NUMBERS
7.1.1
Addresses