KEYENCE LS-7000 - Manual (Page 181)

9-5
Chapter 9 Troubleshooting
9
Problem Inspection Remedy
Check that the communications cable
is correctly connected. Connect the communications cable
correctly. (See page 7-2)
Check that the wiring specifications
of the communications cable are
correct. Check the wiring of the
communications cable. (See page 7-2)
Check that the communications
specifications are set correctly. Set the LS-7000 Series so that the LS-
7000 Series will be the same as the
peripheral device in communications
specifications. (See page 5-7)
Check that the communications
program is correct. Check if the commands and delimiters
are transmitted and received correctly.
(See page 7-1)
Check that the communications
method is correct and that it is set
properly according to the peripheral
device. Select the correct D-MODE and D-
SEND settings. (See page 5-7)
RS-232C
communi-
cations are
not possible.
Check that the LS-7000 Series is
wired correctly. Check the output circuit and wiring.
Connect the cables correctly.
Check that the logic is correctly set.
Check that the retrieval timing is
correct.
The LS-7000 Series has negative logic
output.
Use the strobe output and retrieve the
input in correct timing. (See page 6-3,
6-5, 6-6)
Check that the right BCD SELECT
signal is input. Input the signal correctly.
(See page 6-9)
Check that the I/O mode is correctly
set. Select the BCD mode. (See page 4-
59)
BCD output
does not
turn ON.