6.2.3.3
Setup
1.
Wire the MP 923 interface converter in accordance with fig. 6-5.
NOTE
The MP 923 is supplied with 12 VDC power via the RS 485 (RS 422)
connector of the BERGER LAHR controller.
ATTENTION
The interface cables must be shielded on both ends via the con-
nector shells!
ATTENTION
For reasons of noise immunity, the V24 (RS 232) cable should be as
short as possible (15 m max.)!
2.
Switch on the mains voltage.
→
The LED “POWER ON” lights up. The two other LEDs remain
dark.
3.
Start data transmission.
→
Depending on the sense of the data transmission, either the
LED marked “RS 485
→
V24” or the LED marked
“RS 485
←
V24” lights up.
6.2.3.4
Status indicators
The status indicators show the operating status or any malfunction.
LED
Lit
Not lit
Flashing
“POWER ON”
Supply voltage available
Supply voltage not
available
“RS 485
→
V24”
RS 485 (RS 422)
interface incorrectly
wired (signal lines TxD
(TxD) and RxD (RxD)
interchanged)
No data transmission
from RS 485 (RS 422) to
V24 (RS 232)
Data transmission from
RS 485 (RS 422) to V24
(RS 232) enabled
“RS 485
←
V24”
V24 (RS 232) interface
incorrectly wired (pins 2
and 3 interchanged)
No data transmission
from V24 (RS 232) to
RS 485 (RS 422)
Data transmission from
V24 (RS 232) to
RS 485 (RS 422) enabled
Appendix
WDP3-01X Ident. no.: 00441109760
6-7