Siemens SIMATIC ET 200SP - Behavior of a DI (Ssi_Absolute_Encoder)

Using the SSI_Absolute_Encoder technology object
4.4 Configuring SSI_Absolute_Encoder
Counting, measurement and position detection
Function Manual, 12/2017, A5E32009889-AG
145
4.4.4
Behavior of a DI (SSI_Absolute_Encoder)
Setting function of the DI
By configuring a digital input, you specify which functions the digital input triggers at
switching.
You can select from the following options:
Function of a digital
input
Meaning
Additional option-specific parame-
ters
Capture (Page 33) The configured edge at the respective digital input saves the
current position value as a Capture value. The technology
object displays the Capture value at the output parameter
CapturedValue.
The function can only be used for one of the two digital inputs.
• Input delay
• Edge selection
Digital input without
function
No technological function is assigned to the respective digital
input.
You can read the signal state of the digital input via the re-
spective static variable (Page 165) of the technology object:
• UserStatusFlags.StatusDI0
• UserStatusFlags.StatusDI1
• Input delay
Note
You can choose the "Capture"
function only in operating mode "Use position value (SSI
absolute value) as reference".
Input delay
By configuring the input delay, you suppress interferences at the digital inputs. Signals with a
pulse duration below the configured input delay are suppressed.
You can select from the following input delays:
● None
● 0.05 ms
● 0.1 ms (default)
● 0.4 ms
● 0.8 ms
● 1.6 ms
● 3.2 ms
● 12.8 ms
● 20 ms