Sierra Monitor Corporation TR-005 user manual

Summary of the content on the page No. 1

Technical Reprint TR-005
Gas Detection Systems
How to make your facility's monitoring data accessible
by Gordon Arnold
You really have to have back-
bone to survive in the safety
monitoring world today. No,
there is no heavy lifting re-
quired. I am referring to the
data backbone of the facility,
plant or process to which the
monitoring system is applied.
In times past, gas monitor-
ing systems were free-stand-
ing, and any data they gen-
erated was collected and used
on a local basis. Today, pl

Summary of the content on the page No. 2

Knowing the protocol When a specification states that a product has an RS-485 inter- face, it only defines the serial elec- trical hardware connection and not the protocol. It is important for the safety professional to also know the protocol. While hun- dreds of serial protocols exist in the instrumentation world, the most common serial protocol is Modbus RTU. Likewise, when a specification states that a product has an Ethernet port, it only defines the form of the hardware interface, New featu