Device Range That Can Be Set - Mitsubishi Electric GOT2000 Series Connection Manual

■4. MODBUS communication control function on the GS device
(1) Function overview
This function is to prevent the communication response delay that occurs because the devices on the MODBUS
network differ from each other in network specification.
This function is effective for the MODBUS network conditions as described below:
When only a part of function codes is supported (Example: "0F" is not supported)
When the maximum transfer size of function code is small (Example: The maximum number of coil read times is
1000)
(2) Communication setting
When the MODBUS
connection, the following cases are possible. The communication settings are shared between the assigned multiple
channel numbers, or the individual communication setting is configured for a specific channel number.
By setting the device GS579, either the GS device used for sharing communication settings (GS570 to GS576) or the
GS device used for individual communication setting (GS590 to GS617) is validated.
GS device
GS579
For details of GS devices (GS570 to GS576) and GS devices (GS590 to GS617), refer to the next page.
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6.5 Device Range that Can Be Set

POINT POINT POINT
(1) Range of coils and input relays that can be monitored
The device range of MODBUS equipment differs depending on the type.
When using types that the device range for coils and input relays are other than
hexadecimal, monitoring to the device maximum range may not be possible.
In this case, the device range extends to the last number divisible by 16.
Example: For a type whose coil device range is from 0 to 9999.
The range that can be actually monitored is from 0 to 9984.
(2) Address conversion example
When monitoring the holding register's address "1234H", GT Designer3 displays "4*****"
since GT Designer3 processes the internal conversion in decimal format as follows:
GT Designer3 converts the holding register's address "1234H" to "04660" in decimal format.
Then, "+1" is added to this decimal address since the holding register's address on GT
Designer3 always starts from "1."
Therefore, the holding register's address "1234H" is displayed as "404661" on GT
Designer3.
Holding register
®
/TCP communication driver is assigned to multiple channel numbers using Ethernet multiple
Description
Validity of setting channel number
1234H
"4 04660" +1
"404661"
Bit0:0Configure the Ch1 communication settings between GS570 to GS576.
1Configure the Ch1 communication settings between GS590 to GS596.
Bit1:0Configure the Ch2 communication settings between GS570 to GS576.
1Configure the Ch2 communication settings between GS590 to GS603.
Bit2:0Configure the Ch3 communication settings between GS570 to GS576.
1Configure the Ch3 communication settings between GS604 to GS610
Bit3:0Configure the Ch4 communication settings between GS570 to GS576.
1Configure the Ch3 communication settings between GS611 to GS617.
Set value