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Siemens Building Technologies
Commissioning instructions OZW775 V2.01
CE1C5663en
HVAC Products
Further commissioning steps
22.06.2012
5.3.4 Error codes for modem communication
Error code 5021 provides information on the following errors:
•
Modem switched off
•
No modem connected
•
RS-232 cable unplugged
Error code 5021 is reset after the modem again replies correctly after reset, or if there
is no message receiver with data point "Interface = Modem" after reconfiguration.
"Message receiver x = Modem" (x = 1 => 5023… x = 4 => 5026)
If at data point "Message repetition = None" or "1", "2", or "3" is set, and if no message
could be sent, error code 5023 is displayed for message receiver 1, or 5024, 5025,
5026 for message receivers 2, 3 and 4 respectively.
No error is generated for data point "Message repetition = Unlimited".
Error codes 5023…5026 are sent only to message receivers that do not send via
modem (data point cannot be "Interface = Modem"). The error codes, however, sent via
"Interface = USB" or "Ethernet" and to the KNX bus. The history contains a log entry for
the errors.
Error codes 5023…5026 are not generated if error code 5021 "No modem communica-
tion" is already pending (error code 5021, see above).
Error codes 5023…5026 are reset as soon as the corresponding message receiver can
again be reached.
Error codes 5023…5026 are generated when the modem responds to the dial
command (e.g. ATDT0417242424) with the following codes:
3 NO CARRIER
No connection to the partner modem. Possible causes:
Partner modem switched off, no partner modem connected, partner
modem does not respond ("ACS Alarm" does not work), wrong
phone number.
4 ERROR
Phone number with invalid characters.
6 NO DIALTONE No dial tone, problem with local telephone cable. Possible causes:
Wrong cable between modem and telephone connection,
connection between modem and telephone connection interrupted,
no telephone connection.
7 BUSY
Phone number busy.
No modem
communication 5021
Message receiver x not
reached 5023…5026
Reasons for
error codes 5023…5026