schmersal PSC1 - Response Times When Using the Inputs and Outputs on the Expansion Modules

Installation manual
HB-37420-810-01-25F-EN PSC1-C-100 Installation manual - V2.2.docx Page 149 of 201
Version: 25F
For the V and s curves with overspeed distance the following applies:
Parameter
Acceleration method
Remark
t
Resp
Value from PSC1 response time data
+ delay in external shutdown chain
Delay in external shutdown
chain from relay / contactor,
brake manufacturer data etc.
a
F
, a
V
n.a.
Estimation from application
V
a2
= a
F
* t
Resp
+ (V
S
2
+ 2 * a
F
* XF)
1/2
With its action, the filter displaces the set speed threshold V
a
upwards by an amount
delta_v_filter. For the application, the new values for the response time (TResp = T
PSC1
+
TFilter), as well as the resulting speed on shutdown by the PSC1, must be taken into account.
6.4 Response times when using the inputs and outputs on the expansion
modules
The basis for the calculation of response times is the cycle time of the PSC1. system. In
operation this is T_cycle = 16 / 24 / 32 ms. The response times stated correspond to the
related maximum propagation time within the PSC1-C-100 module for the specific application.
Depending on the application, further application-dependent response times for the sensors and
actuators used must be included in the calculation to obtain the total propagation time.
Function
Description Response
time [ms]
Explanation
Worst-case delay, input in the
basic module to the PAE
T
IN_BASE
T
Cycle
E.g. activation of a monitoring function by an
input signal in the
basic module
Worst-case delay, input expansion
module to the PAE in basic module
T
IN_Exp
T
Cycle
+ 6 ms
E.g. activation of a monitoring function by an
input signal in the expansion module PSC1-E-x
Processing time PAE to PAA in
basic module
T
PLC
T
Cycle
Shutdown by a monitoring function or by
an input in the PAE
Activation / deactivation of digital
output in basic module from PAA
T
OUT_BASE
-
Activation or deactivation of an output in
the basic module after change in the PAA
Activation / deactivation of digital
output in expansion module via
PAA on basic module
T
OUT_Exp
T
Cycle
+ 8 ms
Activation or deactivation of an output in
the expansion module PSC1-E-x after
change in the PAA in the basic module