Assigning variables for ph, Ph connection, Figure 19 analogue output ph tag – Rockwell Automation T8013 Trusted SOE and Process Historian Package User Manual
Page 25: Figure 20 entering a prochist board
Trusted
TM
SOE and Process Historian Package T8013
Issue 16 April 2010
PD-T8013
25
4.9. Assigning variables for PH
Process Historian deals with analogue tags only and is intended to compliment SOE. Tags must have
the suffix ‘_PH’ at the end of the tagname and must be connected to a prochist board. A Modbus
address is not necessary.
4.9.1. PH Connection
To configure a tag for connection to Process Historian it should be configured as an output. Figure 19
shows a tag created to connect to a prochist board. The tag may be a real or integer. There is no need
to enter extended attributes. The tagname must end with _PH.
Figure 19 Analogue Output PH Tag
A prochist board must be declared within the IEC1131 TOOLSET I/O connection.
Double click on a free number in the I/O Connection. Select boards, find prochist and select OK.
This will enter a prochist board in the I/O Connection table as shown in Figure 10 above.
Figure 20 Entering a prochist Board