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Modem
Siemens Building Technologies
HVAC Products
Command sequence: Settings > Communication > Modem
Data point
Modem type
Default val:
Analog
Setting val:
ISDN
GSM
Analog
Fax protocol
Default val:
Fax Class 2
Setting val:
Fax Class 2
Fax Class 2.0
Baud rate RS-232
Default val:
Automatic
Setting val:
1.2 kBd, 2.4 kBd,
4.8 kBd, 9.6 kBd,
19.2 kBd, 38.4 kBd,
57.6 kBd,
115.2 kBd
Command abortion
connection
Default val:
~~~+++~~~ATH0
Setting val:
Depending on
modem type
(see AT command)
Reset command
Default val:
ATZ
Setting val:
(see AT command)
Initialization command
Default val:
ATE0V1Q0L1&C1&D2S0=2
Setting val:
(see AT command)
Command opening
connection
Default val:
Setting val:
Depending on
modem type
(see AT command)
Command closure
Default val:
^M
Setting val:
AT command
Modem message interval
Default val:
2 min
Setting val:
2...30 min, at
resolution 1 min
Commissioning instructions OZW775 V2.01
Parameterize OZW775
Explanation, example
Use ref. DP "Modem type" to specify the modem
type you want to use to communicate via
modem interface RS-232.
The setting values for DPs "Command abortion
connection" and "Command opening
connection" depend on the modem type.
Protocols "Fax Class 2" or "Fax Class 2.0" for
commercially available modems.
Modems with other protocols are not supported
for fax messages.
Baud rate to communication via modem
interface RS-232.
Setting value "Automatic" applies to plug&play
operation. This value helps determine the
highest possible baud rate upon the next reset
command. However, the baud rate can continue
to be set.
AT command for ref. DP "Modem type"
~~~+++~~~ATH0
Analog:
~~~+++~~~ATH
ISDN:
~~~+++~~~ATH
GSM:
Setting value for modems with AT command
ATZ
set:
.
Setting value for modems with AT command
ATE0V1Q0L1&C1&D2S0=2
set:
AT command for ref. DP "Modem type"
ATDT
Analog:
ATD
ISDN:
ATD
GSM:
Setting value for modems with AT command
^M
set:
.
Setting value 2...30 minutes configures the time
between connection abortion and opening a
connection.
This time ensures that the central
communication unit can be called by modem
between 2 connections (e.g. from an external
operator station).
.
63/148
CE1C5663en
22.06.2012
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