SI25101B_e.DOC / Mrz-08
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6.
Frequency Divider and Error Signals
The programmable frequency divider provides decrease of the output frequency by an
adjustable division rate between 1:1 and 1: 128.
The following errors are detected and indicated by the yellow LED and the Error output:
•
Wire break with one of the signals SIN+, SIN-, COS+ or COS-
•
Too low amplitude on one of above signal lines
•
The input frequency exceeds it’s maximum level, the output frequency is unable to
follow
•
The signals REF+ and REF- are not subject of the error check procedure. Depending on
the settings on the DIL2 switch, error signals remain active until remote
acknowledgement, or reset automatically upon elimination of the error.
•
In case of an error the proper function of the unit is not ensured and a loss of encoder
pulses can occur.
DIL2: ( 0 = OFF, 1 = ON )
Divider and testing functions
8 7 6 5 4 3 2 1
1 1 1 1 1 1
1
:
2
1 1 1 1 1 0
1
:
4
1 1 1 1 0 1
1
:
6
1 1 1 1 0 0
1
:
8
1 1 1 0 1 1
1
:
10
1 1 1 0 1 0
1
:
12
1 1 1 0 0 1
1
:
14
1 1 1 0 0 0
1
:
16
1 1 0 1 1 1
1
:
18
- - - - - - - - - - - - - -
- - - - - - - -
0 0 0 0 0 0
1
:
128
Division rate
1
Automatic
error
reset
0
Static
error
message
Error LED and output
0
Divider
switched
on
1
Divider
switched
off
Divider
