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Installation manual
CNC 8055
CNC 8055i
11.
CNC-PLC COMMUNICATION
SOFT: V02.2X
Auxiliary M, S, T functions
TBCD (R558)
The CNC tells the PLC by means of this 32-bit register, the pocket number in the magazine where
the selected tool is.
If the general parameter RANDOMTC (P25) has been set so it is not a random magazine, the
magazine pocket position coincides with the tool number.
This will be coded in BCD format (8 digits).
If no T has been programmed in the block, the CNC will assign a value of $FFFFFFFF to this register.
The T function will always be executed at the beginning of the block and the CNC will wait for the
general logic input AUXEND to be activated to consider the execution completed.
Special values for the TBCD register (R558):
• TBCD = 0: The requested tool is in the spindle.
• TBCD = -2: The requested tool is in the change position.
• TBCD = -4: The requested tool is a ground tool.
T2BCD (R559)
This register is used when a special tool change has been made (family code >=200) or with
machining centers with a non-random tool magazine (general machine parameter RANDOMTC
(P25).
The CNC tells the PLC by means of the 32 bit register, the position of the magazine (empty pocket)
in which the tool which was on the spindle must be deposited.
This will be coded in BCD code (8 digits). If a second T function is not required the CNC will assign
a value $FFFFFFFF to the register.
The second T function will be sent together with M06 and the CNC will wait for the general logic
input AUXEND to the activated to consider the execution completed.
NT2BCD (R572)
This register is used for tool magazine handling.
When a new T is executed, the CNC sends the PLC register the magazine position where the active
tool will be put. When executing the next M6, the value of register "NT2BCD" will be transferred to
register "T2BCD".
This information will be sent out for any type of magazine with an automatic tool changer as long
as the bit 12 of general parameter TOOLTYPE (P167) is active.
T 123 = 0000 0000 0000 0000 0000 0001 0010 0011
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