Permalert PAL-AT AT30K User Manual

2 Operating PAL-AT
32
2.10.1 PALCOM 10 Software
PermAlert offers Windows®-based PALCOM 10 Communication software packages that monitor up to 254
PAL-AT systems 24/7. Refer to the “Communications Options for PAL-AT and LiquidWatch” data sheet
or the Palcom 10 User’s Guide for details.
2.10.2 Customer Software
In addition, PAL-AT can communicate with an external computer using software written by the customer
to read the display and enter keypad data. The communications protocol uses ASCII characters.
The data format is:
8 data bits
1 stop bit
No parity
9600 to 115,200 baud
AD Command
First, an address command must be sent to the system. The address command is "AD,XX" where "XX" is
the address, or System ID, of the system in hexadecimal format. Allowable values are 01 to FE (1 to 254).
The “ESCape” key character clears the PAL-AT input buffer. It is recommended to send “ESC” before the
address string at the beginning of each communication session. The corresponding system responds with
a prompt "MON 30A> " (30 may vary).
DI Command
The “DI”, or Display, command enables the user to read the PAL-AT LCD display remotely. When PALAT
receives the ASCII string "DI", it transmits 2-lines, 40 characters each, plus CR, that duplicates the LCD
display.
KP Command
The “KP”, or Keypad, command allows the user to enter keypad data remotely. When PAL-AT receives
the ASCII string "KP," followed by any combination of numerals "0" to "9", "*" or "#", it responds in the
same manner as if the numbers were entered at the keypad. The command is ended when a ".” is received.
CS Command
The “CS”, or Cable Status, command returns the status data for all cables. When PAL-AT receives "CS",
it responds with 4 lines of data. Each line gives the status of each cable, the number of alarms in the alarm
queue, and the distance to the problem (or probe number). Each line is 8 bytes long plus a carriage return.
The 8 bytes in each line of the ASCII response is decoded as follows:
_ _ _ _ _ _ _ _+CR
1 2 3 4 5 6 7 8
Byte # Description
1 Cable # (1-4)
Byte # Description Byte # Description
2 Cable Status (defined below) 3 Number of alarms in alarm queue
0=not installed 4
1=off-line 5 Distance or probe number
2=normal 6
3=leak 7
4=break 8 (sum of bytes 1- 7) MOD 10
5=short
6=probe active
7=probe reset
8=drying
9=no end/fault in 50 ft [15 m]

Permalert PAL-AT AT30K Specifications

General

Brand	Permalert
Model	PAL-AT AT30K
Category	Measuring Instruments
Language	English