Installation manual
CNC 8055
CNC 8055i
CONCEPTS
7.
SOFT: V02.2X
·343·
Auxiliary M, S, T function transfer
2. It sends out to the PLC the 3 M functions programmed to be executed after the move.
It sets logic outputs "MBCD1=61", "MBCD2=62", "MBCD3=63" and it activates the general logic
output "MSTROBE to "tell" the PLC to go ahead with their execution.
Should any of them need the AUXEND activated, the CNC will "wait" for this signal to be activated
before going on to executing the rest of the block.
If none of them need the AUXEND signal activated, the CNC will maintain the "MSTROBE" signal
activated for a period of time set by the general machine parameter "MINAENDW (P30)". This
output stays active for the time indicated by general parameter MINAENDW (P30).
S function
The CNC transfers the "S function" out to the PLC only when using the BCD-coded "S" output.
spindle parameter SPDLTYPE (P0) set to other than "0".
The CNC sends the programmed "S" value via logic output "SBCD" (R557) and activates the general
logic output "SSTROBE" to indicate to the PLC to go ahead with its execution.
This transmission is carried out at the beginning of the block execution and the CNC will wait for
the "AUXEND" general input to be activated and then consider its execution completed.
T function
The CNC will indicate via the variable "TBCD" (R558) the T function which has been programmed
in the block and activates the general logic output "TSTROBE" to tell the PLC to go ahead with its
execution.
This transmission is made at the beginning of the block execution and the CNC will wait for the
general input "AUXEND" to be activated to consider the execution completed.
Second T function
The CNC transfers the second T function to the PLC in the following cases:
• When having a machining center with non-random tool magazine. general parameter TOFFM06
(P28) = YES and RANDOMTC (P25) = NO.
• When using a random tool magazine, general parameter RANDOMTC (P25) = YES and a
special tool change takes place. See the chapter "Tool table" of the operating manual.
On executing the M06 function, a the CNC indicates the position of the magazine (empty pocket)
where the tool being in the spindle must be placed.
This indication will be made by means of the variable "T2BCD" (R559) and by activating the general
logic output "T2STROBE" to tell the PLC that it must execute this. The CNC will wait for the general
input AUXEND to be activated to consider the execution completed.
It must be borne in mind that at the beginning of the execution of the block, the CNC can tell the PLC
the execution of the M, S, T and T2 functions by activating their STROBE signals together and waiting
for a single signal "AUXEND" for all of them.
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