FC6A S
ERIES
M
ICRO
S
MART
A
LL
-
IN
-O
NE
T
YPE
C
OMMUNICATION
M
ANUAL
FC9Y-B1730
6-9
6: M
ODBUS
C
OMMUNICATION
Calculating Modbus Addresses for FC6A Series MicroSmart Devices
FC6A Series MicroSmart Device
Calculating Modbus Address
Calculation Example
I, Q, M
Example: M325
(32 – 0)
×
8 + 5 + 1001 = 1262
Modbus address: 1262
1262 – 1 = 1261 = 04ED
Slave addresses in communication: 04ED
R, T, C, D
Example: D756
(756 – 0) + 400001 = 400757
Modbus address: 400757
Extract lower 5 digits
→
757
757 – 1 = 756 = 02F4
Slave addresses in communication: 02F4
Modbus Device Name
FC6A Series MicroSmart Device
Minimum Address (4)
Offset (5)
Coil
Q0 - Q627
0
1
R000 - R255
0
701
M0000 - M2557
0
1001
M2560 - M7997
2560
3049
M8000 - M8317
8000
9001
M10000 - M17497
10000
11001
Input Relay
I0 - I627
0
100001
T000 - T255 (timer contact)
0
101001
C000 - C255 (counter contact)
0
101501
T256 - T1023 (timer contact)
256
102001
C256 - C511 (counter contact)
256
104001
Input Register
T000 - T255 (timer current value)
0
300001
C000 - C255 (counter current value)
0
300501
T256 - T1023 (timer current value)
256
302001
C256 - C511 (counter current value)
256
304001
Holding Register
D0000 - D7999
0
400001
D8000 - D8499
8000
408001
T000 - T255 (timer preset value)
0
409001
C000 - C255 (counter preset value)
0
409501
D10000 - D55999
10000
410001
T256 - T1023 (timer preset value)
256
462001
C256 - C511 (counter preset value)
256
464001
M XXX X
(2): Octal
(1): Decimal
(
(1)
–
(4)
)
×
8 +
(2)
+
(5)
Minimum Offset
address
D XXXXX
(3): Decimal
(
(3)
–
(4)
) +
(5)
Minimum Offset
address