POWER ELECTRONICS
SD700 – TOUCH-GRAPHIC DISPLAY
SMS SERVICE
41
3.1. Message Management
There are three types of messages:
Query messages:
The user can monitor any visualization parameter or group of visualization parameters by sending
queries in SMS messages to the graphic display. In this way, the user will receive the responses
with the corresponding values by the graphic display. These response messages can be
configured to be sent periodically, according to the user setting. In this way the values can be
updated continuously.
Special messages:
The user can start, stop and reset the drive by sending this type of SMS messages to the graphic
display. The display responds with an acknowledge message.
Notification messages:
The graphic display itself can send this type of messages to inform the user when the motor stars
or stops, and when the drive is in a fault status.
When the graphic display receives a SMS message, it follows the next steps:
1. Check if the phone number exists in the user database. If the number is included in the
database, the process continues in step 2. If not, then it stops here and does not respond
anything to the phone number of the incoming SMS.
2. Check if the incoming SMS is a query or special message. In this case, the process continues in
step 3. If SMS is not a query or special message, the display responds the user with an error
SMS message with the text ‘ERROR. There isn’t any command with that name.’ and stops here.
3. Check if the user has the proper rights or permissions. If the user has them, the process
continues in step 4. If not, the display responds the user with an error SMS message with the
text ‘ERROR. User is not allowed to perform the request action.’ and stops here.
4. Process the incoming query or special message. To arrive at this point, the incoming SMS is
identified with one of the two previous message types and user has enough rights.
On the other hand, the graphic display can send the user SMS messages at specific moments
depending on the circumstances:
If the motor starts or stops, or the drive is in a fault status, and whenever the SMS service is
configured to alert user to such events, the graphic display will send ‘notification messages’ to all
users that have the ‘Notification’ right.
When a query message is configured to be periodic (user set the periodicity in hours), the graphic
display internally assigns a timer to it. Every time this timer expires, the display send user the
present value for all parameters associated to this query message through a SMS message. In
this way, these parameters values are periodically updated.
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