Name
Bytes
Function
Default
DS
IX
SX
CRES
3
reserved
00h
80h
3109h...
310Bh
08h
SSI_EN
1
SSI function
00h
80h
310Ch
09h
1) This parameter may only be transferred at STOP state.
As soon as the module is adapted to the encoder and the parameter
SSI function
is acti-
vated, the module starts with sending the clock signal and evaluating the encoder values.
The received values are stored in the input area.
4.2 In-/Output area
4.2.1 Input area 6byte
At CPU, PROFIBUS and PROFINET the input area is embedded to the corresponding
address area.
IX - Index for access via CANopen
SX - Subindex for access via EtherCAT with Index 6000h + EtherCAT-Slot
More can be found in the according manual of your bus coupler.
Addr.
Name
Bytes
Function
IX
SX
+0
EV_I
4
Encoder value
5410h
01h
+4
C_US
2
16bit µs value
5411h
02h
Here the current encoder value as double word may always be found. If the SSI function
is disabled the encoder value still remains.
With missing the power supply of the encoder the encoder value
F ... Fh as binary code respectively
A ... Ah as gray code is returned.
In the SLIO module there is a 16bit timer (μs ticker). With PowerON the timer starts
counting with 0. After 2
16
-1μs the timer starts with 0 again.
At SSI module with each encoder value the value of the timer is stored as 16bit value in
the input area. This timer value corresponds to the 1. active clock edge for the encoder
and so to the time when the encoder value was stored in the output shift register of the
encoder. On this way speed measuring may be realized.
If the μs value in the Listening mode remains constant, then the current
encoder value is invalid.
No byte of the output area is used by the module.
Encoder evaluation
Input area
Encoder value
16bit µs value
Output area
VIPA System SLIO
Deployment
In-/Output area > Input area 6byte
HB300 | FM | 050-1BS00 | en | 20-40
47
