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5
Commissioning
Requirements
After you have completed the assembly and wiring of the RS 485-IS Coupler and
after you have switched on the power supply, the device is ready for operation.
6
Diagnostics
Table 2
Status and error messages of the RS 485-IS Coupler
DP1
DP2
ON
LEDs
DP1
DP2
ON
*
on
*
off
off
off
flash
*
on
es
off
*
on
*
flash
on
es
*
off
on
*
Irrelevant
18
DP1: LED for PROFIBUS DP (yellow)
DP2: LED for PROFIBUS RS 485-IS (yellow)
ON:
24 V power supply to the RS 485-IS Coupler (green)
Meaning
Power to the RS 485-IS is switched on.
The RS 485-IS Coupler is ready for
operation.
Power to the RS 485-IS is not switched
on,
or
the RS 485-IS Coupler is in error state.
PROFIBUS-DP message frames are
received.
PROFIBUS-DP message frames are not
received.
Causes:
S
The DP Master is offline.
S
The bus cable is damaged.
Receiving PROFIBUS RS 485-IS
datagrams.
No datagrams from PROFIBUS RS
485-IS, e.g.
S
a station does not respond. The
station may not be addressed.
S
The bus cable is damaged.
–
Check the 24 V power supply to your
RS 485-IS Coupler,
or
contact your Siemens partner.
–
S
Check the proper seating of the
bus connector.
S
Check the bus cable connection to
the DP master.
S
Switch the 24 V DC power module
off and on again.
–
S
Check the stations which are
connected to PROFIBUS RS
485-IS.
S
Check the bus cable connection to
the DP master.
Product Information RS 485-IS Coupler (6ES7 972-0AC80-0XA0)
Remedy
A5E00207628-02
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