Campbell Scientific CR23X Micrologger User Manual
Page 289
APPENDIX G. CALLBACK (CR23X INITIATED TELECOMMUNICATIONS)
G-7
G.3.4 PAGER APPLICATION
Following is an example program that causes a
CR23X to call a pager in response to an alarm
condition. No data are transferred.
The first program segment (instructions 1
through 5) presets the P97 interrupt disable flag
on the first program execution only.
Input location [3] is used as a master control
register. If Flag 4 is low, then input location [3]
increments by 1. If input location [3] is <> 0, no
further callbacks will be attempted. This way the
number of attempts / pages from one alarm
event can be controlled. Location [3] must
manually be cleared to reset the pager alarm.
CR23X to pager communications are strictly
one-way, so the CR23X will not retry based on
the success or failure of the page. Commas
create a delay between the number being dialed
and page numbers being transmitted. Each
comma causes a 2-second delay. Specific
applications require the number of retries and
the delay to be determined by trial and error.
Four or five successful tests before deployment
are recommended.
*Table 1 Program
01:
10.0
Execution Interval (seconds)
;
;****************************************
;Interrupt disable flag is set high to prevent callback.
;Error location cleared.
;Flag transition states are preset.
;****************************************
;
1: If Flag/Port (P91)
1:
21
Do if Flag 1 is Low
2:
30
Then Do
2: Do (P86)
1:
11
Set Flag 1 High
3: Do (P86)
1:
14
Set Flag 4 High
4: Z=F (P30)
1:
0
F
2:
0
Exponent of 10
3:
4
Z Loc [ ErrorLoc ]
5: Z=F (P30)
1:
1
F
2:
0
Exponent of 10
3:
5
Z Loc [ new_flag ]
6: Z=F (P30)
1:
1
F
2:
0
Exponent of 10
3:
6
Z Loc [ old_flag ]
7: End (P95)
8: Panel Temperature (P17)
1:
1
Loc [ RefTemp ]