Siemens SIMATIC S7-1500 Manual page 72

Feedback bit/value Explanations
STS_DIR This bit indicates the count direction of the last count pulse or the direction of the last position value
change.
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STS_DQ0 This bit indicates the status of digital output DQ0.
STS_DQ1 This bit indicates the status of digital output DQ1.
STS_GATE This bit indicates the status of the internal gate when using an incremental or pulse encoder.
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Note:
In order for the counting logic including the gate control to operate correctly, the startup of the tech-
nology module must finish correctly at least once with a connected incremental or pulse encoder
(STS_READY auf 1). If a connected encoder is not yet ready during the startup, the function of
feedback bit STS_GATE is delayed until the encoder for the technology module is available.
When the technology module starts up without a connected encoder, the startup does not finish
correctly and STS_READY as well as STS_GATE remain set to 0. As soon as an encoder is con-
nected, the startup finishes and STS_GATE functions correctly. An encoder error after a finished
startup has no effect on STS_GATE.
STS_M_INTERVAL This bit indicates that at least one count pulse or a position value change was detected in the previ-
ous measurement interval.
STS_READY This bit indicates that the technology module supplies valid user data. The technology module has
been started up and configured.
STS_SW_GATE This bit indicates the status of the software gate.
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Technology module TM PosInput 2 (6ES7551-1AB00-0AB0)
Manual, 06/2018, A5E03982218-AB
0 means: Down
1 means: Up
0 means: Gate closed
1 means: Gate open
0 means: Gate closed
1 means: Gate open
Configuring/address space
4.3 Manual operation (without technology object)
71