Toshiba IPE002Z 用户手册

 

E6581741 

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9. IO Scanning service 

 

The IO Scanning service is used to exchange I/O data between: 

 A controller or PLC (IO Scanner). 
 Devices (IO Scanning servers). 

This exchange is usually performed by implicit services, thus avoiding the need to 
program the controller (PLC). 
 
The IO Scanner periodically generates the Read/Write Multiple Registers (23 = 0x17) 
request. 
The IO Scanning service operates if it has been enabled in the PLC and the drive. 
The drive parameters assigned to IO Scanning have been selected by default. This 
assignment can be modified by configuration. 
The drive IO Scanning service can also be configured by the option Modbus server. 
 
When the IO Scanning service has been enabled in the VF-MB1/S15 drive: 

 A TCP connection is assigned to it. 
 The parameters assigned in the periodic variables are exchanged cyclically between the 

option and the drive. 

 The parameters assigned in the periodic output variables are reserved for IO Scanning. 

They cannot be written by another Modbus service, even if the IO Scanner is not sending 
its periodic output variables. 
 
 

 

0 Reserved 

Reserved 

 

1 

Scanner write word 1 – configurable (c001) Scanner read word 1 – configurable (c021)

2 

Scanner write word 2 – configurable (c002) Scanner read word 2 – configurable (c022)

3 

Scanner write word 3 – configurable (c003) Scanner read word 3 – configurable (c023)

4 

Scanner write word 4 – configurable (c004) Scanner read word 4 – configurable (c024)

5 

Scanner write word 5 – configurable (c005) Scanner read word 5 – configurable (c025)

6 

Scanner write word 6 – configurable (c006) Scanner read word 6 – configurable (c026)

7-31 Reserved 

Reserved 

It is possible to configure the assignment of periodic variables 1 to 6. 
Please refer to "parameter" about configurable.