Raco Verbatim - Associating a Remote Channel with a PLC Data Register

MODBUS Interface
F-2 Verbatim Owner's Manual
Data registers may actually be spread over a network of PLCs. The autodialer
does not care if RC #2 is associated with a data register in a different PLC from
the data register associated with RC #1. Therefore, when programming the
autodialer to associate a PLC data register with a RC, the node number of the
PLC may be included in the description for the location of the data register.
Additionally, the amount of User Recorded Speech Memory is increased appro-
priately for each Remote Channel configuration. These different quantities of
memory yield total message recording times consistent with each of the
available RC configuration options.
F.2 General Operation
This section describes configuring the Verbatim autodialer to continuously
monitor any data register on the PLC network. Additionally, under user
command, the autodialer may read and write to any PLC data register. The
autodialer will only perform these functions after it has been properly installed,
connected to the PLC network, and programmed.
F.2.1 Associating a Remote Channel with a PLC Data
Register
In order for the Verbatim autodialer to read, write or continuously monitor a
PLC data register the address of the data register must be associated with a
Remote Channel (RC). After a data register address has been associated with a
RC the Verbatim autodialer then knows where to direct queries for the contents
of a data register on the PLC network.
The data register’s complete address description is called the net address. See
section F.4.2 for information about net address formats.
Once a data register’s net address has been associated with a RC, the alarm
criteria may then be programmed. Only after an alarm criteria is entered will
the PLC data register be scanned continuously by the Verbatim autodialer.
When the content of the data register changes to match the alarm criteria, the
RC associated with the data register goes into the alarm state.
RCs in the alarm state behave in exactly the same way as Verbatim autodialer
internal or “physical” channels.
The Verbatim autodialer may be called at any time to receive an annunciation of
the status of channels monitored. PLC registers associated to RCs may be read
and written over-the-phone. Additionally, programming activities may be
performed via the buttons on the user’s phone.