10
Chapter 3
Interface Specification
2
3
3. Block Transfer Protocol
3-1.
System
Line contention system (The master is the equipmemt.)
3-2.
Transmission Control Character
* “H” stands for hexadecimal numbers.
①
ENQ (05H): Request to send
②
EOT (04H): Ready to receive
③
ACK (06H): Acknowledge
④
NAK (15H): Negative acknowledge
3-3.
Protocol Parameter
You can set the following parameters in the NWL display screen with the precision shown below.
Typical
Value
Code
9600
101 (65H)
0.5 S
10 S
45 S
45 S
3
Serial communications speed
Equipment identification number
Error detected in characters
No protocol response determination
No reply message determination
Error detected in a multi-block message
The maximum number of retries
BAUD
DEVID
T1
T2
T3
T4
RTY
Function
Baud rate
Device ID
Character time out
Protocol time out
Reply time out
Block time out
Retry limit
300–9600
0–32767
0.1–10 S
0.2–25 S
1–120 S
1–120 S
0–31
—
1
0.1 S
0.2 S
1 S
1 S
1
Description
Range
Precision
Parameter
Содержание NWL860 Series
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