Siemens SIMATIC S5 ET 200U - Reaction of the Counter Module During Transfer of the Setpoints

9-40
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
You can always enter new setpoints via the PIQ. However, a setpoint is only
valid if the respective output is not switched on. You can use diagnostics bits
S1 and S2 to display the status of the outputs.
The significance of the diagnostics bits is as follows:
Diagnostics bit S1 (bit 1 in the diagnostics byte) = 1: setpoint 1 is reached
and output 1 is switched on.
Diagnostics bit S2 (bit 2 in the diagnostics byte) = 1: setpoint 2 is reached
and output 2 is switched on.
Table 9-5 shows the reaction of the counter module during transfer of the
setpoints.
Table 9-5 Reaction of the Counter Module during Transfer of the Setpoints
Diag. bit Response
S1 = 0
S2 = 0
New setpoint 1 is transferred and is valid immediately.
New setpoint 2 is transferred and is valid immediately.
S1 = 1
S2 = 1
New setpoint 1 only becomes active if a positive edge has
appeared at the enable input.
New setpoint 2 only becomes active if a positive edge has
appeared at the enable input.
Entering New Set-
points for the Co-
unter and Position
Decoder
Function Modules