Installation guide

LMU Users Guide
V1.0.6 December 10 2009
Copyright ©CalAmp DataCom Inc 2009
- 35 - CalAmp Proprietary & Confidential
The message disposition is controlled by S-Register 137. The settings are as follows:
• 1 or 2 = Send Message, Log if Send Fails
• 3 = Log Message
• 4 = Priority Message
• 5 = Unacknowledged Message
• 7 = Route Incoming (Client to LMU) SMS messages to the host serial port. Route all
User Messages to the SMS Destination Address
• 8 = Route Incoming (Client to LMU) SMS messages to the host serial port. Route all
User Messages to the last phone number that sent the LMU a message
5.1.4.9 MDT Mode – Message Count Limit
The Message Count Limit is a means of controlling how much data is sent as User Messages.
It was specifically designed for cases where the same message is repeated often by the serial
device, for instance, a meter that provides a reading every 10s. The Count Limit allows the
LMU to ignore a certain number of these messages before creating a User Message. That is,
the LMU will ignore X-1 messages and create a User Message around the X message. X is
defined by S-Register 141. The lower 7 bits of S-141 define the message count. Bit 7 defines
the scaling. If bit 7 is set, the value in bits 0-6 is scaled by 100. This means that there are two
supported ranges, 0 – 127 messages and 100 to 12700 messages. For example, to filter out 50
messages you would use:
ATS141 = 50
To filter out 500 messages you would use:
ATS141 = 133