Assignment Of The Feedback Interface - Siemens SIMATIC S7-1500 Manual

Configuring/address space
4.3 Manual operation (without technology object)
4.3.5.2

Assignment of the feedback interface

The user program receives current values and status information from the technology
module by means of the feedback interface.
Feedback interface per channel
The following table shows the assignment of the feedback interface:
Byte
offset
Bit 7
from
start
address
Channel
0/1
↓ ↓
0 16
... ...
3 19
4 20
... ...
7 23
8 24
... ...
11 27
12 28
13 29 Reserved
14 30 Reserved
15 31 STS_M_
INTERVAL
Note
Validity of the position value
The position value of an SSI absolute encoder is valid when STS_READY is set to 1 and
ENC_ERROR is set to 0. STS_READY is set to 0 while the module starts up.
68
Bit 6 Bit 5
DINT: Current counter value or position value
DINT: The last acquired Capture value
REAL: Current measured value or DWORD: Complete SSI frame
Reserved
STS_SW_
GATE
STS_DI1 STS_DI0
EVENT_ EVENT_
CAP SYNC
Bit 4 Bit 3
COUNT_VALUE:
CAPTURED_VALUE:
MEASURED_VALUE:
STS_ LD_STS_
READY SLOT_1
STS_DQ1 STS_DQ0
EVENT_ EVENT_
CMP1 CMP0
Technology module TM PosInput 2 (6ES7551-1AB00-0AB0)
Bit 2 Bit 1
LD_ERROR ENC_
ERROR
LD_STS_ RES_EVEN
SLOT_0 T_ACK
STS_GATE STS_CNT
EVENT_ EVENT_
OFLW UFLW
Manual, 06/2018, A5E03982218-AB
Bit 0
POWER_
ERROR
Reserved
STS_DIR
EVENT_
ZERO