NORD Drivesystems BU0270 - Manual (Page 41)

5 EtherCAT - Data transfer
BU 0270 GB Subject to technical amendments 41
It is also possible to only transmit the Low component of the position. This results in a limited value range
(16Bit) from +32,
767 rotations to -32, 768 rotations. This value range can be extended with the aid of the gear
ratio factor (P607 & P608). However, it must be noted that there is an according reduction in the resolution.
5.2.2 The status machine
The frequency inverter passes through a status machine. The changes between various states are triggered
by the respective control commands in the process data control word. The actual status is returned in the
process data status word.
After switching on, the frequency inverter is in “Switch-on disabled” status. This status can only be ended by
transmitting the “Shut down (Off 1)” command.
The answer to a master telegram normally does not yet contain a reaction to the control command. The
controller must check the answers from the slaves as to whether the control command has been carried out.
The following bits indicate the status of the frequency inverter:
Status Bit 6
Switch-on
disable
Bit 5
Emergency
stop
Bit 4
Disable
voltage
Bit 3
Fault
Bit 2
Operation
enabled
Bit 1
Standby
Bit 0
Ready for
switch-on
Not ready to start 0 X X 0 0 0 0
Starting disabled 1 X X 0 0 0 0
Ready to start 0 1 1 0 0 0 1
Activated 0 1 1 0 0 1 1
Operation enabled 0 1 1 0 1 1 1
Fault 0 X X 1 0 0 0
Error active 0 X X 1 1 1 1
Emergency stop active 0 0 1 0 1 1 1
Codes for FI status