Assignment Of The Feedback Interface - Siemens SIMATIC S7-1500/ET 200МР Manual

4.4.6

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
The following table shows the assignment of the feedback interface:
Byte
offset
Bit 7
relative
to start
address
Channel
0/1
↓ ↓
0 4 LS
1 5
2 6
3 7
Explanation of feedback bits
Feedback bit Explanations
LS As a sign of life, this bit indicates through a state change (toggling) that isochronous mode is function-
ing and that the module has updated the feedback interface in the respective bus cycle.
This bit is set to 0 in non-isochronous mode.
STS_READY This bit indicates that the technology module supplies valid user data. The technology module has been
started up and configured.
STS_DI2 This bit indicates the status of digital input DI2.
This bit indicates that one of the following errors has occurred at the encoder signals for the technology
EXT_F
module:
• Load voltage missing
• Wire break of digital input A, B or N (with push-pull encoder)
• Invalid transition of A/B signals (with incremental encoder)
If you have enabled the diagnostic interrupts, the respective diagnostic interrupt is triggered in the event
of encoder signal errors. For information on the meaning of the diagnostics interrupts, refer to the sec-
tion Diagnostics alarms.
The bit is reset automatically as soon as an error no longer exists.
STS_DI0 This bit indicates the status of digital input DI0.
STS_DIR This bit indicates the count direction of the last count pulse.
0 means: Down
1 means: Up
STS_DI1 This bit indicates the status of digital input DI1.
COUNT_VALUE This value returns the current counter value in the first 25 bits of a DINT value.
(Bits 0 to 24)
See also
Diagnostic alarms (Page 72)
Technology module TM Count 2x24V (6ES7550-1AA01-0AB0)
Equipment Manual, 12/2020, A5E31870371-AC
Bit 6 Bit 5
STS_ STS_DI2
READY
Bit 4 Bit 3
EXT_F STS_DI0
COUNT_VALUE (Bits 0 to 23):
DINT: Current counter value
Configuring/address space
Bit 2 Bit 1
STS_DIR STS_DI1
4.4 Fast Mode
Bit 0
COUNT_
VALUE
(Bit 24)
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