[2.09.4] Di Links; Overview Of Di Links; Linking Digital Inputs - Siemens SIPROCESS GA700 Operating Manual

Functions
6.8 [2.09] Settings > Inputs/outputs
6.8.4

[2.09.4] DI links

6.8.4.1

Overview of DI links

Note

Linking digital inputs

You can logically combine up to eight digital inputs using "AND" and "OR" logic operations.
The results of the logic operations, as virtual digital inputs, can also be part of a link and
serve to control functions.
• Only use a link as an input of additional links on the condition that the inputs to be linked
do not already contain results of logical operations.
• A maximum of two linking levels are permitted in a hierarchical structure of links.
• Links in which the result is used as input in links again are not permitted.
As soon as a link is set, the device checks whether a ring closure is present. If a ring closure
is detected, the device outputs a corresponding error message.
6.8.4.2 Linking digital inputs
Requirements
Before you link several digital inputs in a digital input link, the following requirements must be
met:
● MODBUS communication is established (for MODBUS digital inputs only)
● The digital inputs have been configured:
– Setting digital inputs (Page 148)
– Only for transmission of the digital inputs using MODBUS TCP:
150
Setting MODBUS digital inputs (Page 249)
Operating with the Local User Interface
Operating Manual, 06/2017, A5E31930478-05