41
4. Operating procedures
Option (RS485 communication function)
2. Data transmission system
Item
Specifications
Communication standard
EIA standard
RS-485 compliant
Synchronization system
Asynchronous system
Communication system
Half-duplex communication
Transmission code
ASCII code
Communication rate
1200
／
2400
／
4800
／
9600BPS
Communication dist.
Max.500m
（
depends on environmental influences
）
Network
Multi-drop system
（
Max. 1:31 stations
）
Signal wire
Two wires: transmission/reception
Stop bit length
1
／
2bits
Data length
7
／
8bits
Parity
None
／
Odd
／
Even
BCC check
Enabled
／
Disabled
Response delay time
0
～
250msec
Communication address
1
～
99 stations
（
Max. 1:31 stations
）
Communication mode select
RO
／
RW
Note
）
Settings indicated in
are the initial settings of the Unit.
3. Transmission control characters
Symbol
Name
Code
Description
STX
Start of text
02H
Indicates the beginning of a text
ETX
End of text
03H
Indicates the end of a text
R
Read
52H
Command to read a request
W
Write
57H
Command to write a request
ACK
Acknowledge Character
06H
Transmission of acknowledgement of proper
reception
NAK
Negative Acknowledge
15H
Transmission of reply of reception error
Note) R
: Read (Command to read settings or measurements)
W : Write (Command to write settings)
R command can be always available for communication in any mode.
W command is available for communication only in the normal mode and its specific
parameters that can be communicated differ depending on the operating status (during
operation).
See
“
Option
(RS485
communication
function)
7.
List
of
identifiers/commands
” on page 49.
Summary of Contents for DKG610
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