Modem Set-Up; Standard Modem Behavior; Automatic Baudrate Synchronization; Auto / Manual Answer Detection - Honeywell Excel 800 LION Installation And Commissioning Instructions

Excel 800 LION

Modem Set-up

Standard Modem Behavior

If no special modem behavior is required, there is no need
to set up or initialize the modem/ISDN terminal adapter.
The CLLIONLC01 will automatically
•
detect the device (MMI or modem) attached to the
modem interface,
•
set the appropriate communication speed,
•
adapt to alphanumeric return codes used by the
modem.
This automatic detection and adjustment can take up to
5 seconds.
Note
It is highly recommended to use a state-of-the-art modem
and leave it in its factory settings.

Automatic Baudrate Synchronization

The default communication speed between the
CLLIONLC01 and the local modem/ISDN terminal adapter is
9600 baud.
The communication speed between the modem and
terminal adapter and the central's modems/ISDN terminal
adapters is automatically synchronized by the two devices
to the highest speed that both of the devices are capable of.
This feature is called auto-bauding and is a feature that all
state-of-the-art-modems/ISDN terminal adapters provide
when left in their factory default settings.
The communication speed between the central and its
modem/ISDN terminal adapter is part of the modem set-up
at the central.

Auto / Manual Answer Detection

The CLLIONLC01 will automatically detect whether the
modem/ISDN terminal adapter is initialized in auto-answer
or manu-answer mode, and it will set the modem to manual
answer mode (S0 = 0).

Resetting the Modem

For those cases where it is not clear if the modem to be
used is in its factory settings, the modem can be reset to its
factory setting by using the RESET MODEM command in
the start-up sequence or through the HW configuration part
of the system info. sequence on the MMI. This will allow a
quick and easy modem reset without the need to run the
modem set-up software or the Windows™ terminal program.
The RESET MODEM command causes the following
commands to be sent to the modem:
1. ATZ
executes hardware reset on modem
2. AT&FX3&W
resets modem to factory configuration settings, configures
the modem not to wait for the public phone system dial tone,
and writes this to nonvolatile memory.

Set-up for Special Modem Behavior

If special modem/ISDN terminal adapter behavior is
required, the communication device should be set up
according to the instructions provided with it. This typically
involves running a setup program on a computer with the
device connected to the computer serial port or using the
Windows™ terminal program.

Set-up for In-house Telephone Systems

A common case of special modem behavior is when the
modem is connected to an in-house telephone network
requiring a prefix to be dialed before the destination number
to provide access to the public telephone network.
There are two important aspects of the special initialization
of the modem to consider:
• Do not wait for the public network dial tone.
– Typically the init command ATX3 will trigger the
modem to dial without waiting for a public network dial
tone.
– Save this modem set-up in the modem EEPROM with
the command AT&W.
– Check the modem handbook to verify the correct
commands.
– Note that these commands are executed automatically
with the RESET MODEM command.
• Add the prefix required for access to the public telephone
network to the destination telephone number.
– Depending on the in-house telephone system, a
certain prefix may have to be added to the destination
number in the central system configuration/site
definition screen prior to sending the set-up to the
remote CLLIONLC01 Controller.

Set-up for Limited Communication Speed

The communication speed of the modem can be fixed to a
lower rate in case of data transmission errors due to tele-
phone line limitations. See the XI581/582 Buswide Operator
Interface User Guide (EN2B-0126GE51) for the procedure
for fixing the baud rate.
79 EN1B-0375GE51 R0308