175
Communication operation and setting
4
PARAMETERS
(3) Communication operation presence/absence and data format types
Data communication between the computer and drive unit is made in ASCII code (hexadecimal code).
Communication operation presence/absence and data format types are as follows:
Data writing format
Communication request data from the computer to the drive unit 1)
Reply data from the drive unit to the computer 3) (No data error detected)
No. Operation
Run
Command
Operation
Speed
Multi
Command
Parameter
Write
Drive unit
Reset
Monitor
Parameter
Read
1)
Communication request is sent to the
drive unit in accordance with the user
program in the computer.
A1
A, A2
∗3
A3
A, A2
∗3
AB B
2) drive unit data processing time Present Present Present Present Present Present Present
3)
Reply data from the
drive unit (Data 1) is
checked for error)
No error
∗1
(Request
accepted)
CCC1∗4 C
C
∗2
E, E1, E2,
E3
∗3
E, E2 ∗3
With error
(Request
rejected)
DDD D
D
∗2
DD
4) Computer processing delay time 10ms or more
5)
Answer from
computer in response
to reply data 3).
(Data 3) is checked
for error)
No error
∗1
(No drive unit
processing)
Absent Absent
Absent
(C)
Absent Absent
Absent
(C)
Absent (C)
With error
(Drive unit
outputs 3)
again.)
Absent Absent F Absent Absent F F
∗1 In the communication request data from the computer to the drive unit, 10ms or more is also required after "no data error (ACK)". (Refer to page 177)
∗2 Reply from the
drive unit to the drive unit reset request can be selected. (Refer to page 181)
∗3 When any of "0.01 to 9998" is set in Pr. 37 and "01" in instruction code, HFF sets data format to A2 or E2. In addition, data format is always A2 and E2
for read or write of Pr. 37.
∗4 At mode error, and data range error, C1 data contains an error code. (Refer to page 185) Except for those errors, the error is returned with data format
D.
Format
Number of Characters
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
A
ENQ
∗1
Drive unit
station
number
∗2
Instruction
code
∗3
Data
Sum
check
∗4
A1
ENQ
∗1
Drive unit
station
number
∗2
Instruction
code
∗3
Data
Sum
check
∗4
A2
ENQ
∗1
Drive unit
station
number
∗2
Instruction
code
∗3
Data
Sum
check
∗4
A3
ENQ
∗1
Drive unit
station
number
∗2
Instruction
code
∗3
Send
data
type
Receive
data
type
Data1 Data2
Sum
check
∗4
Format
Number of Characters
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
C
ACK
∗1
Drive unit
station
number
∗2
∗4
C1
STX
∗1
Drive unit
station
number
∗2
Send
data
type
Receive
data
type
Error
code 1
Error
code 2
Data1 Data2
ETX
∗1
Sum
check
∗4
