How To Use The Rs-232C Connector - Marantz Professional PMD325 User Manual

OTHER FUNCTIONS

How to use the RS-232C connector

This input/output connector (D-Sub 9-pin female) is used for
RS-232C external control.
A straight cable available on the market can be connected to
this connector to exercise external control and send status
information.
• Connector pin assignment
6 9
1 5
• RS232C Connection
PMD325
Transmit Data 2
Receive Data 3
Ground 5
D-Sub 9 Pin
(male)
The wiring requirements for a 9 pin to 9 pin serial connection,
are a male to female straight cable.
• RS-232C physical specifications
Cable Straight cable
Baud rate 9600 bps
Data bits 8 bits
Parity bit None
Stop bit 1 bit
Flow control None
• Command reception
The command packets have a data length of 5, 6 or 7 bytes.
ASCII codes from 0x00 to 0x7f are used to receive serial data.
At the transmission end, therefore, take steps to convert the
ASCII codes into HEX data to set the data in the data packets.
CR (0x0d) is added as the data packet delimiter.
1 NC
2 TX
3 RX
4 NC
5 GND
6 NC
7 NC
8 NC
9 NC
Typical HOST
2 Rx Data
3 Tx Data
5 Ground
D-Sub 9 Pin
(female)
Example: Reception Time Command (code 2011)
2 0 1
0x32 0x30 0x31
When transmitting commands consecutively, put more than
100ms blank between commands.
Received command data
Command Code
0 2000
1 2001
2 2002
3 2003
4 2004
5 2005
6 2006
7 2007
8 2008
9 2009
Time 2011
Recall/Scroll 2015
Random 2028
Repeat 2029
Next 2032
Previous 2033
Index + 2034
Index - 2035
Pitch Reset 2037
Pitch Up Start 2038
Pitch Up Stop 203801
• Status transmission
The status packets have a fixed data length of 4 bytes.
ASCII codes from 0x00 to 0x7f are used to transmit serial
data. For this reason, the ASCII codes are converted into
HEX data before the data is set in the data packets and
transmitted. CR (0x0d) is added as the data packet delimiter.
Example 1: Transmission Power On (code PWON)
P W O
0x50 0x57 0x4f
Transmitted status data
Status Code
Power On PWON Transmitted when the power is turned on.
Tray Open TROP Transmitted upon completion of tray open.
Tray Close TRCL Transmitted upon completion of tray close.
TOC Error TOCE Transmitted when a TOC read error has occurred.
TOC Reading TOCR Transmitted when TOC read is started.
No Disc NODI Transmitted when "No disc" is detected.
Stop STOP Transmitted when the disc has stopped.
Transmitted along with the track number (xxx)
Play Pxxx
when play is started; also transmitted when
the track number is changed during play.
Pause Axxx
Transmitted along with the track number (xxx)
when the pause status is established.
Fast Forward FFON Transmitted when Fast Forward is started.
Fast Backward RWON Transmitted when Fast Backward is started.
Repeat Off RPOF Transmitted when Repeat Off is set.
Repeat All RPAL Transmitted when Repeat All is set.
Repeat One RPON Transmitted when Repeat One is set.
Repeat A RPA- Transmitted when Repeat A is set.
Repeat AB RPAB Transmitted when Repeat A-B is set.
End Warning ENDW Transmitted when End Warning is started.
1 CR
0x31 0x0d
Command Code
Pitch Down Start 2039
Pitch Down Stop 203901
Program 2041
AMS 2043
Open/Close 2045
Pause 2048
Cancel 2049
Fast Backward Start 2050
Fast Backward Stop 205001
Fast Forward Start 2052
Fast Forward Stop 205201
Play 2053
Stop 2054
A-B 2059
Display (Dimmer) 2071
Menu 2082
Enter 2087
Text 2088
Quick Replay 205304
Cue 205910
N CR
0x4e 0x0d
Description
43