7 Start-Up System Manual Compact Systems
Page 62 of 110 HI 800 141 E Rev. 2.02
3. Assign the global variable to the channel value -> Value [INT] of the input.
4. In the user program, define a global variable of the type needed.
5. In the user program, program a suitable conversion function to convert the raw value into a
used type and consider the measurement range.
6. In the user program, program a safety-related fault reaction using the error code -> Error
Code [Byte].
The user program can process the measuring in a safety-related manner.
If the value 0 for a channel is within the valid measuring range, the user program must, at a
minimum, evaluate the parameter Error Code [Byte] in addition to the process value.
To get additional options for programming fault reactions in the user program, assign global
variable to AI.Error Code and Module Error Code. For more information on the error codes, refer
to the manual of the corresponding compact system or module.
Use of Safety-Related Counter Inputs
The counter reading or the rotation speed/frequency can be used as an integer value or as a
scaled floating-point value.
In the following sections, xx refers to the corresponding channel number.
To use the integer value:
1. Define a global variable of type UDINT.
2. Enter an appropriate initial value, when defining the global variable.
3. Assign the global variable to the integer value Counter[xx].Value of the input.
4. In the user program, program a safety-related fault reaction using the error code
Counter[xx].Error Code.
The global variable provides values to the user program.
To get additional options for programming fault reactions in the user program, assign global
variable to Counter.Error Code and Module Error Code. Refer to the manual of the compact
system or module for more details on how to use the error codes and other parameters of the
counter input.
Use of Digital Inputs
To write a value in the user program to a digital output:
1. Define a global variable of type BOOL containing the value to be output.
2. Enter an appropriate initial value, when defining the global variable.
3. Assign the global variable the Value [BOOL] -> channel value of the output.
4. In the user program, program a safety-related fault reaction using the error code -> Error
Code [Byte].
The global variable provides values to the digital output.
To get additional options for programming fault reactions in the user program, assign global
variable to DO.Error Code and Module Error Code. Refer to the manual of the compact system
or module for more details.
Use of Analog Outputs
To write a value in the user program to an analog output
1. Define a global variable of type INT containing the value to be output.
2. Enter an appropriate initial value, when defining the global variable.
3. Assign the global variable the Value [INT] -> channel value of the output.
4. In the user program, program a safety-related fault reaction using the error code -> Error
Code [Byte].
The global variable provides values to the analog output.
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