Siemens SIMATIC ET 200SP User Manual

Limit monitoring
9.2 Influence of hysteresis and delay time on limit monitoring
Analog input module AI Energy Meter 480VAC/CT HF (6ES7134-6PA00-0CU0)
Manual, 07/2018, A5E42674880-AA
79
The following figure shows the value-over-time for two measured values using the example
of a high and low limit as well as the influence of hysteresis and delay time on the counting
of the limit violations.
Configured limit.
Signal wave
Configured delay time. Is taken into consid-
eration during coming and going.
①
Limit monitoring with hysteresis and delay
time
Hysteresis range. Only considered for out-
going.
②
Limit monitoring with hysteresis, but without
delay time
Value-over-time for which the limit is moni-
tored.
③
Limit monitoring without hysteresis, but with
delay time
Edge change. Counter for limit violations is
incremented by 1. If parameterized, a hard-
ware interrupt is triggered.
④
Limit monitoring without hysteresis and
delay time
Figure 9-1 Influence of hysteresis and delay time on the limit
See also
How limit monitoring works (Page 77)
Minimum and maximum values (Page 84)

Siemens SIMATIC ET 200SP Specifications

General

System Type	Distributed I/O System
Mounting	DIN Rail
Communication Protocol	PROFINET, PROFIBUS
IP Rating	IP20
Category	I/O Systems
Supply Voltage	24 V DC
Modularity	Yes
Hot Swapping	Yes
Storage Temperature	-40°C to +70°C
Digital Inputs	Yes
Digital Outputs	Yes
Analog Inputs	Yes
Analog Outputs	Yes
Communication Interface	PROFINET, PROFIBUS
Number of Modules	Up to 64
Relative Humidity	5 to 95% (non-condensing)
Operating Temperature	-25°C to +60°C