
B-63943EN-1/02-01
Edit
Apprv.
Design
Sheet
Title
Draw
No.
15/126
Date
Design
Descri
tion
Date
FANUC Se
ies 30i/31i/32i-
, 31i-
5
PMC Axis Control
2004.10.7
When the execution of command [1] is completed:
Command [2] is transferred from the waiting buffer to the executing buffer;
Command [3] is transferred from the input buffer to the waiting buffer;
and
Command [4] is transferred to the input buffer as the command block (axis control
block data signal).
After the reception of command [4] by the input buffer, the PMC can issue command [5] to
the CNC (the axis control block data signal is set).
The timing chart for the command operation is shown below.(Table 1.1.1 (e) Timing chart
of command operation)
Command block
[1] [2] [3] [4] [5]
(Input)
EBUFg
(Input)
(1) (2) (3) (4) (5)
Not specifiable
EBSYg
(Output)
Input buffer
[3] [4]
Waiting buffer
[2] [3]
Executing buffer
[1] [2]
Beginning
of execution
End of
execution
Beginning
of execution
Table 1.1.1 (e) Timing chart of command operation
(1), (2), (3), (4), (5) : A new block cannot be issued during these intervals (while EBUFg
and EBSYg are in different logical states). In interval (4), the buffer is in the "full" state.
The status of the CNC buffer can be determined by the exclusive OR of the axis control
command read signal EBUFg, input from the PMC, and axis control command read
completion signal EBSYg, output from the CNC. (Table 1.1.1 (f) Buffering status in PMC
axis control)