Version: 1.06 105
14.4. Remote Tags through modem
With a remote device accessed by modem, the connection must be first established using
an Alarm.
The sequence is the following:
• Create an Alarm Recipient of type ‘ModBus - Master’, with the telephone number of
the remote device.
• Create a ‘Remote Device’, associated to the communication port of the modem and
to a Trigger – DIV (digital register).
• Create the Remote tags associated to this device.
• The alarm is conditioned by a situation requiring communication with another TB
OX
MS leading to a Tag which is the condition of the alarm.
• When modems are connected (can be checked with Digital Communication
Variable DCV ‘COMx.Call’), you activate the Trigger of the TB
OX
MS you are
connected to. This action executes Remote Tags associated to this station.
• Acknowledge the alarm, for instance using the special analog variable ‘AlaRec’.
• Stop connection by writing ‘0’ to the Communication Variable
‘COMx.ModemOffHook’, or the communication will be automatically stopped after 1
minute.
14.5. Timing configuration of Remote Tags
Several timings can be adjusted when communication through Remote Tags.
They are available from the tab ‘Advanced’ of the communication port properties.