2: D
EVICE
2-16
FC6A S
ERIES
M
ICRO
S
MART
A
LL
-
IN
-O
NE
T
YPE
C
OMMUNICATION
M
ANUAL
FC9Y-B1730
Supplementary Descriptions of the Special Data Registers Related to the Communication Functions
■
D8026: Communication Mode Information (Port 1 to 3)
This register indicates communication mode information for Port 1 to Port 3.
The allocation of communication ports in the device (bit assignment) is as follows.
■
D8030: Communication Adapter Information
This register indicates information about the communication cartridges in Port 2 and Port 3.
The allocation of communication ports in the device (bit assignment) is as follows.
■
D8052: J1939 Communication Error Code
When an error occurs in J1939 communication, the error code is written to this register. For details on J1939 communication
error codes, see "J1939 Communication Error Code (D8052)" on page 8-5.
■
D8069 to D8099: Slave (1 to 31) Communication Status/Error
Special data registers used in data link communication. For details, see "Master Station" on page 7-4.
■
D8100, D8102, D8103: Slave Number (Port 1 to 3)
The slave number is written to these registers when the Port 1 to 3 communication mode is maintenance communication,
Modbus RTU slave, or data link communication. The slave number can be changed by changing the value of D8100, D8102, and
D8103 in Function Area Settings
D8100 = Port 1 Slave No.
D8102 = Port 2 Slave No.
D8103 = Port 3 Slave No.
For details on communication modes, see the following in this manual.
•
Maintenance communication: "Maintenance Communication" on page 4-1
•
Modbus RTU slave: "Modbus Communication" on page 6-1
•
Data link communication: "Data Link Communication" on page 7-1
D8492
Expansion Module Slot 12
Information
Type ID/Status
―
R
D8493
System Software Version
―
R
D8494
Expansion Module Slot 13
Information
Type ID/Status
―
R
D8495
System Software Version
―
R
D8496
Expansion Module Slot 14
Information
Type ID/Status
―
R
D8497
System Software Version
―
R
D8498
Expansion Module Slot 15
Information
Type ID/Status
―
R
D8499
System Software Version
―
R
Device
Address
Description
Update Timing
R/W
Bit
15
Bit
0
Bit
7
Bit
8
Bit
4
Port 1
Port 2
Port 3
Bit
3
Bit
11
0 (0000): Maintenance communication
1 (0001): User communication
2 (0010): Modbus RTU master
3 (0011): Modbus RTU slave
4 (0100): Data link communication
Bit
15
Bit
0
Bit
7
Bit
8
Bit
1
Bit
2
Bit
3
Port 2
Port 3
0 (00): No communication cartridges
1 (01): RS-232C communication cartridge
2 (10): RS-485 communication cartridge
3 (11): Free