NORD Drivesystems BU0070 - Manual (Page 13)

4 The InterBus protocol
BU 0070 GB Subject to technical alterations 13
4 The InterBus protocol
InterBus works with a summation frame protocol. Each subscriber has a fixed data length.
Note:
If the mode switch is permanently set (Position 1 – 3), the software/parameter settings are ineffective!
4.1 Drive profile
If the drive is to be operated as per DRIVECOM 21 profile, the frequency inverter can be configured via Parameter
551. This also changes the ID of the subscriber.
Drive profile On (P551 = 1)
ID[7..0]= E3h Æ DRIVECOM with 1 PCP word, RemoteBus
Drive profile Off (P551 = 0) ID[7..0]= F3h Æ Module with 1 PCP word, RemoteBus
To render the profile change effective, the module must be reinstalled (e.g. switch the mains voltage off
and then on again). The entire bus must also be restarted. The profile is only effective with 3 word data
lengths (PPO type 1).
4.2 Data length
The default setting is 5 words when the inverter is switched off.
Attention: After the frequency inverter is switched on, the profile and PPO type settings are read in and
the InterBus reinitialised (P507 and P551).
The data length can be set between 3 and 5 words for the IBS module and is set via the PPO types (P507: see
Chap. 5.1). The PPO types 3 and 4 are reserved.
To render the data length change effective, the InterBus must be reinstalled (e.g. switch the mains voltage
off and then on again). The entire bus must also be restarted.
4.2.1 PPO type 1
3 words data width
Drive profile On (P551 = 1)
ID[7..0]= E3h Æ DRIVECOM with 1 PCP word, RemoteBus
Drive profile Off (P551 = 0) ID[7..0]= F3h Æ Module with 1 PCP word, RemoteBus
4.2.2 PPO type 2
5 words data width
ID[7..0]= F3h
Æ Module with 1 PCP word, RemoteBus
Note: The parameter "Drive profile" has no effect.
0
Control word
Status word
1
Speed setpoint
(rpm )
Speed actual
value (rpm)
PCP
PCP
out
in
2 3 4 5 Byte
0
Control word
Status word
1
PCP
PCP
out
in
2 3 Byte
Setpoint 1
Act. value 1
4 5
Setpoint 3
Act. value 3
6 7
Setpoint 2
Act. value 2
8 9