
B-63945EN/02 7.INTERFACE BETWEEN CNC AND PMC
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Table 7.3.1 (b) Basic specifications of the PMCs for the Series 30i/31i/32i-A
30i/31i/32i-A
Function
First PMC Second PMC
(option)
Third PMC
(option)
Dual-check safety
PMC (Note 1)
PMC memory
• Subprograms (P) 5,000 pieces 512 pieces 512 pieces 512 pieces
• Labels (L) 9,999 pieces 9,999 pieces 9,999 pieces 9,999 pieces
CNC interface(Note 7)
• Input (F) 768 bytes × 10 768 bytes × 10 768 bytes × 10 768 bytes
• Output (G) 768 bytes × 10 768 bytes × 10 768 bytes × 10 768 bytes
DI/DO
• I/O Link(Note 8)
• Inputs (X) Up to 4,096 points Up to 4,096 points Up to 4,096 points Up to 64 points
• Outputs (Y) Up to 4,096 points Up to 4,096 points Up to 4,096 points Up to 64 points
Symbol/comment
Number of symbol
characters (Note 12)
40 40 40 40
Number of comment
characters (Note 10,12)
255 255 255 255
Program storage area
(Note 9)
Up to 1.5 MB of flash
ROM
Up to 768 KB of flash
ROM
Up to 768 KB of flash
ROM
128 KB of flash ROM
NOTE
1 This PMC is used for dual-check safety (DCS). It is used to watch both safety-related
signals and ladder programs. Refer to "Dual Check Safety Operators Manual
(B-64004EN)" for details.
2 NC parameter No. 11930 is used to specify a level-1 execution period. Refer to
"PMC Programming Manual (B-63983EN)" for details. Note, however, that it is
impossible to specify a level-1 execution period for each PMC separately.
3 The maximum overall program size (including the maximum number of ladder steps,
symbols/ comments, and messages) varies depending on option settings. Refer to
"PMC Programming Manual (B-63983EN)" for details.
4 For the number of functional instructions, each parenthesized number indicates the
number of all functional instructions, and each non-parenthesized number, the
number of valid functional instructions.
5 The extra relay is common memory for the multi-PMC function. To put it another
way, its size covers all of the first, second, and third PMCs.
6 This area is used to specify the precision of the variable timer. Do not use this area
in user programs.
7 It is possible to specify which program is used to control a specific CNC system.
Refer to "PMC Programming Manual (B-63983EN)" for details.