Yokogawa DR240 - Manual (Page 275)

14-30 IM DR232-01E
Handshaking
hardware: transmission and reception control by ‘DTR’ ‘RTS’, ‘CTS’ signal enabled.
Software : transmission control by ‘XON’ and ‘XOFF’ enabled.
Capacity of receiving buffer
200 bytes
Escape sequence
for reception only
Functions
• Talker functions
Output of measurement data (ASCII, binary) and setting parameters (ASCII)
• Listener functions
Setting of measurement conditions, control of measurement start and stop (excluding the setting
and control of power on/off), specifying causes of ‘ESC S’ (output of a status byte)
Contents of ‘status’
Syntax error, chart-end, completion of A/D conversion, operations of internal timer, end of data
saving/reading, incomplete measurement during computation
External dimensions
Approx. 57 (W) × 137 (H) × 54 (D) mm
Weight
0.3kg
RS-422-A/RS-485 Style Number: S8
Electrical & mechanical specs
Conform to the EIA RS-422-A and EIA RS-485 Standard
Connection format
Multi-drop 1:n (n=16 for RS-422-A, n=31 for RS-485)
Communication format
Half duplex
Synchronizing format
Start-stop asynchronous transmission (synchronized by start/stop bit)
Baud rate (bps)
150, 300, 600, 1200, 2400, 4800, 9600 or 19200 (selectable)
START bit
1 bit (fixed)
Data length
Either 7 or 8 bits (selectable)
Parity
Even, Odd, or None (selectable)
STOP bit
Either 1 or 2 bits (selectable)
Connector
6 point screw type terminal (uses M4 screws)
Minimum response time
0, 10, 20, 50 or 100 ms (selectable)
Reception buffer length
250 bytes
Escape sequence
Trigger, Status call, Open and Close
Electrical characteristics
SDA, SDB, RDA, RDB, SG. Between the signal terminal and the main internal circuit is
insulated functionally.
Communication distance
1.2 km maximum
Terminator
Internal resistor (120 ohm, 1W) switch with the slide switch
14.10 Communication Interface Module