LD25x
8.5 Testing functions
The test menu can be accessed while programming the basic set up, as shown in
section “7.1 Basic settings” on page 14, see
tESt
item. Most of these tests are
for factory use only, but the following tests may be useful also to the user:
Menu
Selection
Text
Description
Cd 11
Cd 10
Cd (Clock- and data wiring test)
When the wiring of clock line and data line is
ok, the display shows “Cd 11”. “Cd 10”
message means that the clock line is ok but
data wires are false (wrong polarity), while "Cd
01" indicates a problem with the clock lines.
In “Master” mode, only data lines are subject to
this test.
Cd iO
C__
d__
Cd__
Cd (Clock- and data function test)
The next test generates clock and data signals
and feeds them directly into the rear terminals.
Therefore
please remove the encoder
connection
.
“Cd iO” informs that clock and data interface
are all right. All remaining messages indicate
there is a problem with the SSI interface
circuit.
8.6 Error messages
The unit can detect and display the errors listed below. If you find an error
message, please check again the encoder wiring and the settings of all SSI-
relevant parameters.
Menu
Description
Err -0
Overflow
The selected SSI baud rate is too high. Please set a lower baud rate value.
Err -b
Bit error
The error bit or the power failure bit of the encoder (PFB) are set.
Err -t
Time-out error
In “Slave” mode, during the last 0.6 seconds (plus wait time setting) the unit did not
receive any valid data.
Err -F
Format error
In “Slave” mode, a telegram having a too short length has been received.
Err-E1
Missing encoder (1)
Right after power-up the unit detects that all SSI telegrams are empty (all bits = 1).
Err-E2
Missing encoder (2)
During normal operation the unit detects that regular SSI telegrams are suddenly
followed by empty telegrams (all bits = 1).
MAN LD25x E 1.0.odt
Hints for application
34 of 44
