Fagor CNC 8055i FL EN - Page 278

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Installation manual
CNC 8055
CNC 8055i
6.
MACHINE PARAMETERS
SOFT: V02.2X
PLC Parameters
The Status window of the PLC statistics screen indicates the time the system CPU dedicates to the
PLC. Refer to the operating manual.
PLCMEM (P27)
Not used.
SRR700 (P28) . . . SRR739 (P67)
They are used in the data exchange via Sercos between the CNC and the drives.
They indicate which drive and what type of information will be put in CNC registers R700 through
R739.
P28  R700 P29R701 P30  R702
P31  R703 P32  R704 etc.
The setting format for PLC parameters "P28" through "P67" is 1.5
The units digit identifies the Sercos node number to get information from.
The decimal part indicates the Sercos identifier number.
SWR800 (P68) . . . SWR819 (P87)
They are used in the data exchange via Sercos between the CNC and the drives.
They indicate what type of information is put in registers R800 through R819 and which drive will
be assigned that value.
P68  R800 P69  R801 P70  R802
P71  R803 P72  R804 etc.
The setting format for PLC parameters "P68" through "P87" is 1.5
The units digit identifies the Sercos node number to send information to.
The decimal part indicates the Sercos identifier number.
Same as with sinewave feedback, number of axes and the user channel active, the PLC demands
calculation time from the system CPU.
The more time the CPU dedicates to the PLC, the greater the sampling time will be, general parameter
LOOPTIME (P72).
Example:
P32=1.00040
Indicates that PLC register R704 contains the "VelocityFeedback" supplied by the drive located in Sercos
node 1.
To identify the units of the variables, see the drive manual.
Read-only registers R700 through R739 are updated at the beginning of the PLC scan, unless the
MRD instruction is used.
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Example:
P70=2.34178
Indicates that the value of PLC register R802 will be assigned to "DigitalOutputsValues" of the drive located
in Sercos node 2.
To identify the units of the variables, see the drive manual.
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