Reading/Writing; System Variables - Siemens SINUMERIK 840D sl Function Manual

A4: Digital and analog NC I/O for SINUMERIK 840D sl
2.4 Direct I/O access without PLC
I/O range attributes
● Attribute of the input range 1, 2, ... m:
MD10502 $MN_DPIO_RANGE_ATTRIBUTE_IN[ <n> ] ; with <n> = 0, 1, 2, ... (m - 1)
● Attribute of the output range 1, 2, ... m:
MD10512 $MN_DPIO_RANGE_ATTRIBUTE_OUT[ <n> ] ; with <n> = 0, 1, 2, ... (m - 1)
2.4.3

Reading/writing

2.4.3.1

System variables

Input data
System variable
$A_DPB_IN[<n>,<b>]
$A_DPW_IN[<n>,<b>]
$A_DPSB_IN[<n>,<b>]
$A_DPSW_IN[<n>,<b>]
62
Bit Val‐ Meaning
ue
0 Format display of system variables $A_DPx_IN[<n>,<m>]
0 Little endian format
1 Big endian format
2 Reading of input data
0 Reading possible via system variables and CC-binding
1 Reading possible only for CC-binding
3 Output of slot sign-of-life alarms
0 Slot sign-of-life alarms are issued
1 Slot sign-of-life alarms are suppressed
Bit Value Meaning
0 Format display of system variables $A_DPx_OUT[<n>,<m>]
0 Little endian format
1 Big endian format
1 Writing of output data
0 Writing only via system variable
1 Writing only via CC-binding
3 Output of slot sign-of-life alarms
0 Slot sign-of-life alarms are issued
1 Slot sign-of-life alarms are suppressed
Type Meaning
8-bit unsigned Reads a data byte (8-bit)
16-bit unsigned Reads a data word (16-bit)
8-bit signed Reads a data byte (8-bit)
16-bit signed Reads a data word (16-bit)
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions