Control And Status Word, Encoder - Siemens SINAMICS G120 Operating Instructions Manual

Advanced commissioning
6.5 Drive control via PROFIBUS or PROFINET
6.5.7

Control and status word, encoder

Telegrams 3 and 4 allow the higher-level control system to directly access the encoder.
Direct access is necessary, if the higher-level control is responsible for the closed-loop position
control for the drive.
If you enable the "Basic positioner" position control in the inverter, then telegrams 3 and 4
cannot be selected, and the inverter handles the encoder control.
Control word encoder (G1_STW and G2_STW)
Bit Meaning
0
1
2
3
4
5
6
7
8
...
12
13
14
15
194
Explanation
Bit 7 = 0
Function 1 1 = search for refer‐
ence cam 1 with a pos‐
itive start direction
Function 2 1 = search for refer‐
ence cam 1 with a neg‐
ative start direction
Function 3 1 = search for refer‐
ence cam 2 with a pos‐
itive start direction
Function 4 1 = search for refer‐
ence cam 2 with a neg‐
ative start direction
Command bit 0 1 = activate the function requested using bit 0 ... 3
Command bit 1 1 = read the value requested using bit 0 ... 3
Command bit 2 Reserved
Mode 1 = flying referencing
0 = search for reference cams
Reserved ---
Cyclic absolute 1 = request for the cyclic transfer of the position actual
value value in G1_XIST2 or G2_XIST2
Parking 1 = request to park the encoder
Acknowledge 0 → 1 = acknowledge encoder fault
Bit 7 = 1
1 = request flying referencing
to the rising edge of refer‐
ence cam 1
1 = request flying referencing
to the falling edge of refer‐
ence cam 1
1 = request flying referencing
to the rising edge of refer‐
ence cam 2
1 = request flying referencing
to the falling edge of refer‐
ence cam 2
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
Signal interconnec‐
tion in the inverter
Telegram 3:
Encoder 1:
p0480[0] = r2050[4]
Telegram 4:
Encoder 1:
p0480[0] = r2050[4]
encoder 2:
p0480[1] = p2050[9]
Telegram 102:
Encoder 1:
p0480[0] = r2050[5]
Telegram 103:
Encoder 1:
p0480[0] = r2050[5]
encoder 2:
p0480[1] = p2050[10]