System Variable; Program Operation - Siemens SINUMERIK 840D sl Function Manual

K1: Mode group, channel, program operation, reset response

9.9 Program operation

9.8.9

System variable

Overview of the system variables relevant for SERUPRO:
System variable
$AC_ASUP, bit 20
$AC_SERUPRO
$P_ISTEST
$P_SEARCHL
$AC_REPOS_PATH_MODE
9.9 Program operation
PLC, MD, operation
The execution of part programs can be controlled via the HMI in many ways using PLC inputs,
machine data settings and operator inputs.
Definition
The execution of part programs or part program blocks in AUTOMATIC or MDA modes is
referred to as program operation.
Channel control
Every channel can be manipulated by means of interface signals from the PLC. The control is
exercised via mode groupspecific or channelspecific interface signals. An overview of these
signals is given under data lists in this Description of Functions.
Status messages
Each channel reports its current program operation status to the PLC with interface signals.
These signals are, in turn, divided up into mode groupspecific and channelspecific signals.
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Meaning
ASUB activation reason:
$AC_ASUP, Bit 20 == 1 ⇒ system ASUB active, reason: SERUPRO search goal
reached
SERUPRO status:
$AC_SERUPRO == 1 ⇒ SERUPRO is active
Program test status:
SERUPRO active ⇒ $P_ISTEST == 1
Most recently active block-search type:
$P_SEARCHL == 5 from the start of SERUPRO to reset or end of program
REPOS mode for repositioning the contour after a SERUPRO
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions