IDEC FC6A-C16K1CE - Page 135

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