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RS232 protocol for MBJ controller
1. General description
This description refers to the MBJ LED controller. Depending on the controller type and hardware not all of the
functions might be supported.
2. Supported Controller
Controller
CTR-50, CTR-50/500
3. Firmware Revision
Controller / FW Rev.
CTR-50 / 1.1
CTR-50 / 1.2
CTR-50 / 1.3 & 1.4
CTR-50/500 / 1.5
4. RS232 Settings
RS232 Baud Rate
RS232 Data Bits
RS232 Parity
RS232 Stop Bits
5. Protocol and method of operation
The controller always operates in slave mode. Each action (read, write or program data) has to be initiated by the
master device (e.g. PLC or PC). Communication between the master and the MBJ controller is based on ASCII
codes. Upper and lower case characters have the same meaning. Expect 0x0a for LF("\n") ASCII control
characters are NOT used. After a command has been sent please wait for the reply command before sending the
next one.
Default settings, valid after system boot, are stored in the EEPROM memory, but can be redefined and overwritten
by dedicated EEPROM write commands. Data of RAM write commands are temporary and valid until system shut
down only.
5.1 Messages examples (with echo)
Read command :
"RC\n"
Reply command:
RAM write command: "WB50\n"
Reply command:
RAM write command: "WB50\n"
Reply command:
EEPROM write command:
EEPROM reply command:
Remark
I/F: RxD, TxD, GND
Notes, implemented commands
Full command set support
New operating mode: smart auto detect
Max. flash length in manual mode for EXT
and MBJ mode set to 1000ms
Rev. 1.5 for CTR-50/500 version only
9600
8
N
1
"RC\0700\n"
(read out actual set current of 700mA)
(RAM only: set target brightness to 50%)
"WB50\nOK\n"
"WB50\nOK\n"
"EB\n"
"EB\nOK\n"
MBJ Imaging GmbH
support@mbj-imaging.com
Neuer Höltigbaum 15
www.mbj-imaging.com
DE 22143 Hamburg
Tel.: +49 40 226 1623 30
(successful)
(1st: set RAM target brightness to 50%)
(successful)
nd:
(2
write RAM data to EEPROM)
(successful)
CTR RS232 Protocol
Release: 1.04
10.01.2017
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