RESI®
Titel:
Manual RESI-DMX-MODBUS converter
Datum
Seite
Von
23.02.2015
12
17
.
P
ro
p
ri
e
ta
ry
d
a
ta
,
co
m
p
a
n
y
co
n
fid
e
n
ti
a
l.
A
ll
r
ig
h
ts
re
s
e
rv
e
d
.
C
o
n
fié
à
tit
re
d
e
se
c
re
t
d
'e
n
tr
e
p
ri
s
e
.
T
o
u
s
d
ro
its
r
é
se
rv
é
s
.
C
o
m
u
n
ic
a
d
o
c
o
m
o
se
g
re
d
o
e
m
p
re
sa
ri
a
l.
R
e
se
rv
a
d
o
s
to
d
o
s
o
s
d
ir
e
ito
s.
C
o
n
fid
a
d
o
co
m
o
s
e
cr
e
to
i
n
d
u
s
tr
ia
l.
N
o
s
re
s
e
rv
a
m
o
s
t
o
d
o
s
l
o
s
d
e
re
c
h
o
s
.
.
.
W
e
it
e
rg
a
b
e
s
o
w
ie
V
e
r
v
ie
lf
ä
lt
ig
u
n
g
d
ie
s
e
r
U
n
te
rl
a
g
e
,
V
e
r-
w
e
rt
u
n
g
u
n
d
M
it
te
ilu
n
g
ih
re
s
In
h
a
lt
s
n
ic
h
t
g
e
s
ta
tt
e
t,
s
o
w
e
it
n
ic
h
t
a
u
s
d
r
ü
c
k
lic
h
z
u
g
e
s
ta
n
d
e
n
.
Z
u
w
id
e
rh
a
n
d
lu
n
g
e
n
v
e
r-
p
fl
ic
h
te
n
z
u
S
c
h
a
d
e
n
e
rs
a
tz
.
A
ll
e
R
e
c
h
te
v
o
rb
e
h
a
lt
e
n
,
in
s
b
e
-
s
o
n
d
e
re
fü
r
d
e
n
F
a
ll
d
e
r
P
a
te
n
te
rt
e
il
u
n
g
o
d
e
r
G
M
-E
in
tr
a
g
u
n
g
.
.
6
Function description
The RESI-DMX-ASCII converter is designed to integrate a DMX light subsystem into an automation device
very easily. The automation device has to offer a serial interface (RS232 or RS485), which is capable of
sending and receiving simple ASCII messages. The converter also offers the possibility to control the 512
DMX lights via a MODBUS/RTU based serial interface of an automation device, because the converter is also
a MODBUS/RTU slave. The RESI-DMX-MODBUS converter is designed to control a DMX light system with
MODBUS/RTU protocol.
The bases for this integration are lamps with ballasts, which are compatible to the DMX standard.
Please refer to the DIN 56930-2, ANSI E1.1 norm for more operational details about the DMX light system.
If the converter works properly, the state LED flashes with a 1 second period. Is there an internal error in the
converter, then the state LED flashes with a 250m period.
Is the DMX connection ok and the converter is cyclically sending data to the DMX lamps, the DMX LED is
always on. If the user has stopped the cyclic sending of DMX data, then this LED flashes faster with 250ms
cycle.
For the communication with ASCII strings, the ASCII messages starts with a special start character # (0x23,
35dec) and the message ends with a special end character (0x0d, 13dec or CARRIAGE RETURN). The
answer of the converter uses the same start and end characters. Please refer the chapter ASCII command
description.
For communication via MODBUS the following MODBUS functions are available:
READ HOLDING REGISTER (function code: 3)
PRESET SINGLE REGISTER (function code: 6)
PRESET MULTIPLE REGISTERS (function code: 16)
Note:
The functions READ HOLDING REGISTER and PRESET MULTIPLE REGISTERS are limited to max. 50 register
per query!
More information about the MODBUS/RTU slave functionality see the chapter MODBUS Registers.