Siemens SINUMERIK 840D sl Function Manual page 1084

P4: PLC for SINUMERIK 828D
14.2 Fast on-board inputs and outputs
Response times
This results in the following response times depending on the position control cycle, place of
execution and digital inputs/outputs that are used:
Position control cycle clock
Signal at the input terminal → processing in the PLC program → signal at the output terminal
1)
Read/write access operations
Input/output signals are directly read and written at the module input/outputs. For the fastest
possible access (servo-synchronous), use of the direct operation commands in the interrupt
program INT0 is recommended:
Command
Direct NO contact
Direct NC contact
Directly set bit value
Directly reset bit value
Directly assign bit value
Parameterization
Using machine data, the input/output signals can be exclusively allocated to the NC or the PLC:
● MD10366 $MN_HW_ASSIGN_DIG_FASTIN[ <n> ]
● MD10368 $MN_HW_ASSIGN_DIG_FASTOUT[ <n> ]
with <n>: Index to address the input/output byte (0 = 1. byte, 1 = 2. byte, ...)
Inputs:
Outputs:
Inputs:
Outputs:
References
A detailed specification of the interfaces is provided in:
SINUMERIK 828D PPU Manual
1084
Processing via:
● Subprogram SBRx in cyclic operation (MAIN, OB1)
● Digital inputs/outputs: I/O module PP 72/48
● Interrupt program INT0 (servo synchronous)
● Digital inputs/outputs: Onboard inputs/outputs of the PPU
I/O signals
DIN1 ... DIN4
DOUT1 ... DOUT4
DIN9 ... DIN12
DOUT9 ... DOUT10 MD10368[ 1 ] = 00 01 01 01
Assignment
NC
MD10366[ 0 ] = 00 01 01 01
MD10368[ 0 ] = 00 01 01 01
MD10366[ 1 ] = 00 01 01 01
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
1.5 ms 3 ms
Response time
1)
12.5 ms 14 ms
3 ms 4.5 ms
Symbol
-| I |-
-| /I |-
-(SI)-
-(RI)-
-( I )-
PLC
MD10366[ 0 ] = 00 01 00 01
H
MD10368[ 0 ] = 00 01 00 01
H
MD10366[ 1 ] = 00 01 00 01
H
MD10368[ 1 ] = 00 01 00 01
H
Basic Functions
H
H
H
H