
U90 Ladder Software Manual
114
Sending the message to the M90
1. Enter the number of the M90's GSM modem exactly as you would enter any GSM cell
phone number, then send the message.
Checking that the M90 has received the SMS message
You can check if the M90 received your message by using the Acknowledge feature:
1. Select the ACK box as shown below.
2. Use your cell phone to send the message "Holding Temperature:#110#" to the
M90.
3. The M90 receives this SMS message.
4. The M90 immediately returns the message to your cell phone, together with the
current variable value.
5. You can now view this SMS message on your cell phone display, together with
changes in the variable value.
Variable Types
Although SMS messaging supports Integer and List variables, note that you cannot send
List variables via cell phone.
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