Siemens simatic et200sp User Manual

Limit monitoring
9.2 Influence of hysteresis and delay time on limit monitoring
Analog input module AI Energy Meter 480VAC ST (6ES7134-6PA20-0BD0)
68 Manual, 12/2015, A5E36061895-AA
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
Image 9-1 Influence of hysteresis and delay time on the limit
See also
How limit monitoring works (Page 66)
Minimum and maximum values (Page 71)

Siemens simatic et200sp Specifications

General

Category	I/O Systems
Power Supply	24 V DC
Protection Rating	IP20
Number of Modules	Up to 64 modules
Mounting	DIN Rail
Communication Protocols	PROFINET, PROFIBUS
Storage Temperature	-40 °C to +70 °C
Digital Inputs	Yes (depending on module)
Digital Outputs	Yes (depending on module)
Analog Inputs	Yes (depending on module)
Analog Outputs	Yes (depending on module)
Modularity	Modular
Relative Humidity	5 to 95% (non-condensing)
Weight	Varies by configuration
System Type	Distributed I/O