PROFI-8455 – Q&A
1. Q: How do I know the status of the PROFI-8455?
A: You can observe the RUN LED in PROFI-8455 panel. If RUN LED
is light, data is exchanging. Otherwise it must be error in the
previous state. You can see Q&A 3 to solve it.
2. Q: Have I must set the PROFI-8455’s address before power
applied?
A: You can change the address after power applied, but you should
let the PROFI-8455 offline at least 5 second. After 5 second offline,
PROFI-8455 will reset by itself, and then apply the new setting of the
rotary switches.
3. Q: If PROFI-8455 couldn’t establish communication with DP-Master,
what can I do?
A: In General, the PROFI-8455’s error is due to the following
reasons.
1. Parameter Fault- PROFI-8455’s ERR LED will have an interval of
0.5 second in each flash. It may reduce from “error module
selection”.
2, Configuration Fault-PROFI-8455’s ERR LED will have an interval
of 1 second in each flash. It may reduce from “error installation
order”.
3, DP-Master OFFLINE-PROFI-8455’s ERR LED will light until
establish data exchange connection. You should switch DP-Master
status from OFFLINE to OPERATE.
4, DP-Master STOP-PROFI-8455’s ERR LED will flash quickly
(time interval may less then 0.5 second). You should switch
DP-Master status from STOP to OPERATE.
4. Q: Which Modules is faster among the same Module Number
(I-87017 and I-8017H)?
A: I-8K series is faster than I-87K series. It is due to the
communication interface, I-8K use Parallel interface, and I-87K use
the serial communication.
