SCADA Controls Warnings and Alarms via Modbus TCP Interface
Two-way Communication – The Classic Intercom Function
Modbus is a protocol for field bus systems using the Master/Slave principle. Modbus Slave and Modbus Master communicate with each other, whereas information is exclusively exchanged via (Modbus) registers. A Modbus Master reads the Registers of the Modbus Slave at regular intervals (polling) to be able to act on status changes.
Intercom and PA/GA
In one of our first blog posts, I gave an introduction to two-way communication, the most common type of voice connection used in Intercom systems (see Intercom and PA/GA). With this blog article, I want to provide more information on two-way communication.
You’ve surely heard of intercom systems and PA/GA systems. But how are they exactly defined? And what are the differences? This article compares both concepts and focuses on the main differences. Intercom Intercom systems are mainly used to support process-related voice communication in industrial environments. You have either a pre-defined subscriber to which you establish […]