User's Manual

Performing Advanced Functions

RETURNS Result: a list of current status parameters. The list is self-explanatory.

EMARKS GET only. Valid for the A733GSM RTU only.

EMOTE No.

XAMPLE GSMSTAT

GSM modem on: Yes

SIM card found: Yes

PIN set: Yes

PIN accepted: Yes

Sleepmode OK: Yes

PUK required: No

Default IMEI nr: No

Attempts left to enter PIN: 3, PUK: 10

Note: The A733GSM RTU can be called via the GSM interface from a standard modem.

The command line interface is therefore remotely accessible. In this respect, many

commands that are otherwise as not remotely accessible can be in fact accessed

remotely.

3.5 Notifications

Notifications are frames sent asynchronously by devices that are otherwise slaves.

The notifications are received by a device closest to the host and then sent to the

host. If the host is not available, the receiving device will store the notification and

wait until it is questioned by the host. At this point, it will inform the host that it has

a notification. It is then the task of the host to issue a command to read the

respective notification.

Before a device can issue a notification, the notification must first be enabled.

Special frames are used to this end, depending on the notification type. If an end

device is not able to send a notification due to radio propagation or other kinds of

communication problems, it will store the date/ time when the notification took

place. As soon as the communication is re-established, the device will try to send

the notification again.

Note: To avoid collisions, the device will wait a random time (up to 10 seconds) before

sending the notification frame.

The following notifications are currently implemented for the A733 device:

• NOPC—Notification On Port Change (see “PORT” on page 33);

• NOTR—Notification On Threshold Reached (see “ANLG” on page 26).

Note: The A733GSM RTU currently does not suppport notifications.

3.6 Returned errors list

Following are error messages you might get.