ifm electronic RN3001 - Manual (Page 20)

Encoder with Profibus interface
20
The status bits in the input double word have the following meaning
Bit Meaning
28 Rotational direction 0 = increasing clockwise
(seen on the shaft)
1 = increasing counter-clockwise
(seen on the shaft)
27 Software
Limit switch
0 = lower limit switch ≤ actual
value ≤ upper limit switch
1 = actual value > upper limit
switch or actual value < lower
limit switch
26 Operating mode 0 = set-up mode 1 = normal mode
25 Readiness for operation 0 = encoder not ready for
operation
1 = encoder ready for operation
10.3 Set-up mode
If the encoder is switched to the set-up mode via parameter setting, the gearbox
factors can be determined directly in the system via a teach operation�
The set-up mode is signalled by the encoder via a flashing green LED in the
terminal cap and via bit 26 in the input double word (set to 0)�
In the set-up mode the parameters set during projection (direction of rotation,
scaling) are ignored and the values saved in the internal EEPROM are used� If the
direction of rotation and gearbox factor are changed during the set-up mode, the
new values are stored in the EEPROM�
Process during the set-up mode
► Install the device in the system�
► Enable the set-up mode via parameter setting�
► Adapt the direction of rotation (if required)�
► Move the system to the starting position�
► Transmit the start command for the teach operation to the encoder�
► Move the system to the end position�
► Transfer the requested number of steps to the encoder with the "stop teach
operation" command�
► Set the preset value�
► Transfer the values determined during the teach operation to the projection
(parameters)�
► Disable the set-up mode during parameter setting�