Specifications

Parameters/address space
4.2 Address space
DI 16x24VDC HF Digital Input Module (6ES7521-1BH00-0AB0)
16 Manual, 07/2014, A5E03485952-AD
Value status (Quality Information, QI)
The value status is always activated for the following module names:
● DI 16x24VDC HF QI,
● DI 16x24VDC HF QI S
● DI 16x24VDC HF MSI
An additional bit is assigned to each channel for the value status. The value status bit
indicates if the read in digital value is valid. (0 = value is incorrect).
Address space for configuration as 16-channel DI 16x24VDC HF
The following figure shows the assignment of the address space for the configuration as a
32-channel module with value status. You can freely assign the start address for the module.
The addresses of the channels are derived from the start address.
Figure 4-1 Address space for configuration as 16-channel DI 16x24VDC HF with value status