Siemens SIMATIC ET 200S - Page 73

1PosInc/Digital
3.6 Functions of the 1PosInc/Digital
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
73
Control Signals: Search for Reference
Address Assignment
Bits 0.7 to 0.4:
7 6 5 4 Bit
0 0 1 1
MODE 3 = Reference Point Run
Byte 0
Bit 3: SPEED (SPEED = 0 is creep feed; SPEED = 1 is rapid feed)
Bit 2: DIR_M
Bit 1: DIR_P
Bit 0: START
Bytes 1 to 3 Reference point coordinates
(linear axis: 0 to 16 777 215; rotary axis: 0 to end of rotary axis - 1)
Feedback Signals: Search for Reference
Address Assignment
Byte 0 Bit 3: SYNC
Bit 2: POS_ DONE
Bit 1: POS_ERR
Bit 0: POS_ACK
Bytes 1 to 3 Actual value
(linear axis: 0 to 16 777 215; rotary axis: 0 to end of rotary axis - 1)
Parameters: Search for Reference
Parameters Meaning Value range Default setting
Reference point run and evaluation of the reference signal
Reference signal This parameter defines the relevant
switch or the combination of switch and
zero mark.
• Reference switch and zero
mark
• Reference switch
• Zero mark
Reference switch and
zero mark
Reference switch Relevant in the case of reference
signal:
• Reference switch and zero mark
• Reference switch
This parameter defines the referencing
direction in which the relevant switch
must be traversed.
• Reduction cam towards
minus
• Reduction cam towards
plus
• Minus limit switch
• Plus limit switch
Reduction cam
towards minus
Start direction of the
reference point run
• Plus
• Minus
Plus