Operation
Operating Manual PNOZ mmc3p
1002423EN02
17
7
Operation
When the supply voltage is switched on, the PNOZmulti safety system copies the configur
ation from the chip card.
The LEDs "POWER","DIAG", "FAULT", "IFAULT" and "OFAULT" light up on the base unit.
The expansion module PNOZ mmc3p is configured and started automatically. The
"ONLINE" and "OFFLINE" LEDs indicate the status of the PNOZ mmc3p on PROFIBUS
DP.
If the expansion module PNOZ mmc3p does not receive a configuration from the base unit
for a period of 30 s, the expansion module PNOZ mmc3p connects to PROFIBUSDP and
"ONLINE" status is displayed on PROFIBUSDP. The error message "External Error" is
sent to the Master.
7.1
Messages
Legend:
LED on
LED flashes
LED off
LED
Meaning
POWER
Supply voltage is present.
Supply voltage is not present
ONLINE
PNOZ mmc3p Online, data exchange is possible
Master has sent the telegram "Global Control Clear". Virtual input bits i0 ... i23
are set to "0"; expanded input bits i24 ... i127 are frozen.
PNOZ mmc3p Not online
OFFLINE
PNOZ mmc3p Offline, data exchange is not possible
PNOZ mmc3p Not offline
