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6. Communication
61. Address Setting
To communicate with the blow unit, it is necessary to configure the unit address for each blow unit.
Use the address setting switch to set the address. Up to 15 units can be connected in a daisy-chain.
Ensure that there are no duplicated addresses. Duplicated addresses prevent correct communication.
Also, do not set the address switch No. to "0". This setting disables communication.
62. Communication Specification
(Communication settings specification)
Item
Description
Communication protocol
Modbus-RTU
Physical layer
RS-485
Communication method
Half duplex, start-stop
Maximum number of
connected units
15 Max
Address Setting
1-F[15] (use the rotary switch on the front body)
Communication is disabled when set to 0.
Communication speed
115.2 kbps
Data bit
8 bit
Start bit
1 bit
Stop bit
1 bit
Parity
Odd number
Flow control
None
(Communication frame configuration)
Start
Address
(1-15)
Function code
(1-6)
Data
Error check
CRC
End
Silent interval with 3.5
characters (350 s) or more
1 byte
1 byte
n byte
2 byte
Silent interval with 3.5
characters (350 us) or more
(Corresponding function code)
Function code
Function term
Description
1
Read Coil Status
DO state (0/1) read
2
Read Input Status
DI state (0/1) read
3
Read Holding Register
Retention register read
4
Read Input Register
Input register read
5
Force Single Coil
DO state (0/1) overwrite
6
Preset Single Register
Retention register overwrite
63. Communication Data Address
Use the data address when reading or modifying (writing) data in Modbus communication.
6-3-1. Read Coil Status (function code: 1)/ Force Single Coil (function code: 5)
Read by the function code 1, and overwrite by the function code 5.
(Readable and overwritable binary data, such as ON/OFF, is deployed)
Data address
Term
Description
0
Stop
Operation stop (equivalent to I/O connector terminal No.8: STOP)
Operation stops when toggled to 0 -> 1
* The operation status is reset before starting the operation.
1
Start
Operation start signal (equivalent to I/O connector terminal No.9: START)
Operation starts when toggled to 0 -> 1
2
ZC
Electrostatic potential sensor zero calibration execution (equivalent to I/O connector
terminal No.10: ZC)
Calibration is executed when toggled to 0 -> 1
* Automatically cleared to 0 when the execution successfully completes. If zero
calibration does not complete after 100 ms, the process is not complete
successfully. Check the connection state and the electric potential, etc.
Address setting switch
ADDRESS
ADDRESS
Address
Remark
Switch No.
0
0
Do not configure
1
1
-
2
2
-
3
3
-
4
4
-
5
5
-
6
6
-
7
7
-
8
8
-
9
9
-
A
10
-
B
11
-
C
12
-
D
13
-
E
14
-
F
15
-
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