Micromod MOD: 1800P - MOD 30ML Identity Module (Version 2) System, I/O and Communications Functions - Manual (Page 240)

Logic Functions - Book 1
DIGITAL INPUT BLOCK
7-30
Figure 7-21. Digital Input Block (DI), General Menu
7.3.1 Digital Input Block Operation
The digital input block is a loop function block that provides a logical input link to an input
module (one physical input point). As many input blocks as required can be connected to a
module block source. The input value is buffered in the group state table for the loop.
Process input and output routines use these tables to pass data between the module blocks
and the function blocks which run at the configured scan group interval.
An input block uses the Input Module pointer specified during configuration to set the
connection between the block and the module. This connection is fixed by configuration and
can not be changed through the database.
7.3.2 Digital Input Block Parameters
The mnemonics, valid values, and data types for all fields that may be selected for display
and/or be used in making softwiring connections are listed in Table 7-8. The following further
defines the digital input block configuration parameters.
Block Type
DI
This is the digital input block type.
Occurrence
1 to 4096
There may be up to 4096 ‘instances’ allowed of the DI block type.