Siemens SIMATIC ET 200AL Manual page 27

Configuration modes for digital inputs/outputs
3.3 Parameters/address space
Configuration mode DI8/DQ8
In DI8/DQ8 configuration mode, the address space is reduced by the fixed parameter
assignment of the channels.
Figure 3-5
Configuration mode DIQ MIX
In DIQ MIX configuration mode, the address space is reduced by the fixed parameter
assignment of the channels.
Figure 3-6
Evaluating the value status
An additional four bytes are occupied in the input address space if you enable the value
status for the digital input/digital output module. The value status of the inputs is assigned to
the input bytes x + 2 and x + 3. The value status of the outputs is assigned to the input bytes
x + 4 and x + 5. This additional information provides information regarding the validity of the
digital values or channel status.
Bit = 1: No error on channel.
Bit = 0: Error on channel.
If the channel is configured as input, this means:
● Short-circuit of an encoder supply to ground, or
● Parameter error, or
● For channels 8 ... 15: Missing load voltage 2L+
If the channel is configured as output, this means:
● Short-circuit of the output to ground, or
● Parameter error, or
● For channels 8 ... 15: Missing load voltage 2L+
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Address space in DI8/DQ8 configuration mode
Address space in DIQ MIX configuration mode
Digital input/Digital output module DIQ 16x24VDC/0.5A 8xM12 (6ES7143-5AH00-0BA0)
Manual, 03/2019, A5E38688112-AC