Instruction manual

PARAMETERS
113
5) Waiting time
Specify the waiting time between the receipt of data at the inverter form the computer and the transmission
of reply data. Set the waiting time in accordance with the response time of the computer between 0 and
150ms in 10ms increments (e.g. 1 = 10ms, 2 = 20ms).
Computer
↓
Inverter
Inverter
↓
Computer
Inverter data processing time
=waiting time + data check time
(set value
×
10ms) (12ms)
Note: If the Pr. 123 "waiting time setting" value is not 9999, create the communication request data with no
"waiting time" in the data format. (The number of characters is decremented by 1.)
6) Sum check code
The sum check code is 2-digit ASCII (hexadecimal) representing the lower 1 byte (8 bits) of the sum
(binary) derived from the checked ASCII data.
1
0 1E1 07ADF4
H05 H30 H31 H31H45 H31 H30 H37 H41 H44 H46 H34
(Example1)
Computer
→
Inverter
ASCII code
→
Station
number
Instruction
code
*Waiting
time
Data
Sum check
code
←
Binary code
Sum
↓
30 + 31 + 45 + 31 + 31 + 30 + 37 + 41 + 44
HHHHHHHHH
H
0 117 0 30
H02 H30 H31 H37H31 H37 H30 H03 H33 H30
7
(Example2)
Inverter
→
Computer
ASCII code
→
←
Binary code
Sum check
code
STX
Station
number
Read data ETX
Sum
↓
30 + 31 + 31 + 37 + 37 + 30
HHHHHH
H
ENQ
*When Pr. 123 "waiting time setting"
≠
‚ 9999, create the communication request data with no "waiting time" in the data format.
(The number of characters is decreased by 1.)
=1F4
=130
7) Error code
If any error is found in the data received by the inverter, its definition is sent back to the computer together
with the NAK code. (Refer to page 117)
Note: 1. When the data from the computer has an error, the inverter will not accept that data.
2. Any data communication, e.g. run command, monitoring, is started when the computer
gives a communication request. Without the computer's command, the inverter does not
return any data. For monitoring, therefore, design the program to cause the computer to
provide a data read request as required.
3. Data for link parameter expansion setting differs as indicated below between access to
Pr. 0 to Pr. 99 values and access to Pr. 100 to Pr. 905:
Instruction
Code
Data
Read H7F H00: Pr. 0 to Pr. 99 values are accessible.
Link parameter
expansion setting
Write HFF
H00: Pr. 0 to Pr. 99 values are accessible.
H01: Pr. 100 to Pr. 159, Pr. 200 to Pr. 231 and Pr. 900 to
Pr. 905 values are accessible.
H02: Pr. 160 to Pr. 199 and Pr. 232 to Pr. 285 values are
accessible.
H03: Pr. 300 to Pr. 399 values are accessible.
H09: Pr. 990 and Pr. 991 values are accessible.
4