Counter status byte – BECKHOFF M3120 User Manual
Page 6
M3120 Incremental encoder 4x
Beckhoff II/O-Lightbus
Page 6 of 14
Version 1.1
Date 20.10.94
Bit
Value
Signal
Function
4
-
-
not used
5
-
-
not used
6
-
-
not used
7
-
-
not used
Rem.:
The READ, SET and ENABLE commands can be transmitted in any form.
Counter status byte
After an II/O-Lightbus read operation the counter status of the M3120 points to the module in
the data byte DO. The bits of the counter command byte stand for the following functions :
7
6
5
6
3
2
1
0
STAT
KOM
LV
GF2
GF1
GF0
EE1
EE0
Bit
Signal
Function
0
EE0
Evaluation mode;
must be selectet inside the D-SUB connector by bridges to GND
1
EE1
*)
2
GF0
3
GF1
a low pass filter is adjustable by software
4
GF2
the low pass filter is abjustable to 1250 kHz by hardware
5
LV
zero point value valid
LV = 0
The EL command was transmitted, but there was no zero impulse
yet.
LV = 1
the zero point value was latched
6
KOM
COMPLEMENTARY
shows, if a bridge is present in the D-SUB connector
KOM=0
evaluation of normal pick off signals A, B, C; bridge to GND inside
the D-SUB connector
KOM=1
additional evaluation of complementary signals; open, no bridges
inside the D-SUB connector
A, /A, B, /B, C, /C
7
STAT
status signal
not in use yet