MOVITRAC
®
31.. PROFIBUS Fieldbus Interface
23
The PROFIBUS-DP
Interface
3
01176AEN
Fig. 25: Ident number MOVITRAC
®
31.. with FFP 31..
The ident number is defined as an unsigned 16-bit number (Unsigned16). The PROFIBUS User
Group has specified the Ident Number 3100hex (12544dez ) for the MOVITRAC
®
31.. range of
inverters (
→
Fig. 25).
The PROFIBUS User Group has specified the Ident Number 3111hex (12561dez ) for the inverters
MOVITRAC
®
31.. size 0 with PROFIBUS-DP (
→
Fig. 26).
01177AEN
Fig. 26: Ident number MOVITRAC
®
31.. size 0 with PROFIBUS-DP
3 .3
Watchdog Timer
Each DP slave must have a watchdog timer so it can detect a failure of the DP master or the
communications link. If no data are transferred between the DP master and DP slave within the
specified timeout period, the slave must automatically switch its outputs to a safe state.
The MOVITRAC
®
31.. inverter maps the timeout period defined when the DP master is configured
to parameter
571 Fieldbus Timeout (Fig. 27). This parameter consequently reflects the currently
configured timeout period. If the watchdog timer is not active, the parameter will have a value of
650.00 seconds.
01178AEN
Fig. 27: A fieldbus timeout period of 200ms configured in the DP masker
When the timeout period expires, the inverter invokes the fault response specified beforehand in
parameter
572 Timeout Response. This means the response of the inverter when the bus goes
down can be adapted to that of the drive application. For example, conveyor belts can continue to
run at the most recent valid setpoint speed or brought to a stop very quickly.
MOVITRAC 31.. with Option FFP 31..
Ident-Number: 3100
or 12544
®
hex
dec
MO
VI
TR
AC
®
841
E
Q
RUN
BUS
FAULT
Fieldbus
CONTROL MODE
MOVITRAC 31.. size 0 with PROFIBUS-DP
Ident-Number: 3111
or 12561
®
hex
dec
841
E
Q
Fieldbus
CONTROL MODE
P ROFIBUS
DP
571 0.20 s
FIELDBUS TIME OUT
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
