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CTI 2572 Installation and Operation Guide
81
C1000, 1001, and 1002 have been programmed as the alarm bits for the alarm
conditions. When one of the alarm bits goes true, the pointer to the
desired message string to be sent in the E-mail is moved into V109 of the
command block. The one-shot allows the message to only be triggered on the
first transition of the alarm bit to true to prevent sending the message
multiple times
. The pointer to the Send E-mail command is moved into command
slot 1 (WY5) and C19 is set to enable the command trigger
C1000 1 LDC-----------+ LDC-----------+ C19
10 [-] [---:O:---! !-*-! !---------------------(SET )
! ! A:V109 ! ! ! A:WY5 !
! ! N=1400 ! ! ! N=100 !
! ! ! ! ! !
! +-------------+ ! +-------------+
!C1001 2 LDC-----------+ !
[-] [---:O:---! !-]
! ! A:V109 ! !
! ! N=1500 ! !
! ! ! !
! +-------------+ !
!C1002 3 LDC-----------+ !
[-] [---:O:---! !-+
! ! A:V109 !
! ! N=1600 !
! ! !
! +-------------+
This is a typical 257x trigger ladder rung.
C19 WX2.3 WY4.2
36 [-] [-*-]/[-------------------------------------------------------*-( )
! ! !
!WY4.3! ! WY4.3
[-] [-+ [-( )
! !
! ! C19
! +-(RST )
This rung acknowledges an error if the error bit is set.
!WX2.1 WY4.1
52 [-] [---------------------------------------------------------------( )
!
Resulting E-mail
From: bjones@ABCcompany.com.
Sent: December 15, 1999 @ 3:10PM
To: jdoe@ABCcompany.com;dsmith@ABCcompany.com
Subject: Zone 1, PLC A – Pump Station
Low coolant level detected in main reservoir