Limit value monitoring

You can define two limit values for each analog input:

Limit 1
Limit 2

For each limit value there is a variable of the same name in the process data. See chapter Process image. The variable shows whether the current measured value lies above or below the limit value.

Defining a limit value

Enter the limit value in the corresponding parameter.

Value range: 0x8000 … 0x7FFF (-32768 … 32767)

Channel	Connection	"Limit 1"	"Limit 2"
1	X01	0x800:13	0x800:14
2	X02	0x810:13	0x810:14
3	X03	0x820:13	0x820:14
4	X04	0x830:13	0x830:14
5	X05	0x840:13	0x840:14
6	X06	0x850:13	0x850:14
7	X07	0x860:13	0x860:14
8	X08	0x870:13	0x870:14

Activating the monitoring

In the factory setting, the limit value monitoring is disabled for both limit values.

You can enable the limit monitoring by setting the parameter "Enable Limit 1/2" for the respective limit value to TRUE:

Channel	Connection	"Enable Limit 1"	"Enable Limit 2"
1	X01	0x0800:07	0x0800:08
2	X02	0x0810:07	0x0810:08
3	X03	0x0820:07	0x0820:08
4	X04	0x0830:07	0x0830:08
5	X05	0x0840:07	0x0840:08
6	X06	0x0850:07	0x0850:08
7	X07	0x0860:07	0x0860:08
8	X08	0x0870:07	0x0870:08

Evaluation

Evaluate the input variables "Limit 1" and "Limit 2" in the process data in accordance with the following table:

Variable value	Meaning
Variable value	"Swap limit bits" ¹⁾ = FALSE	"Swap limit bits" ¹⁾ = TRUE
0	Monitoring is not activated for this limit value.
1	The measured value is smaller than the limit value.	The measured value is greater than the limit value.
2	The measured value is greater than the limit value.	The measured value is smaller than the limit value.
3	The measured value is exactly the same size as the limit value.

¹⁾ "Swap limit bits" is a CoE parameter. "Swap limit bits" is FALSE in the factory setting.

Channel	Connection	"Swap limit bits"
1	X01	0x0800:0E
2	X02	0x0810:0E
3	X03	0x0820:0E
4	X04	0x0830:0E
5	X05	0x0840:0E
6	X06	0x0850:0E
7	X07	0x0860:0E
8	X08	0x0870:0E