Fuji Electric FRENIC-AQUA series User Manual page 50

Interpretation of normal response
- Data are stored from the LSB (the rightmost bit in the table above) in ascending order of coil
number. When a coil is turned on, the data becomes one, and all the remaining bits are
changed to zero.
- The byte length of the read data is filled in the byte count field.
- For a data example, see Table 3.4.
Table 3.4 Example of coil address = 13 and the number of coils = 9
Bit 7
Data's 1st byte BRK
Data's 2nd byte 0
[ 6 ] Force single coil
Query
1 byte 1 byte
Station
05 Coil address
H
address
Hi
Normal response
1 byte 1 byte
Station
05 Coil address
H
address
How to set a query
- Broadcast with station address 0 is not usable. If used, no response is returned.
- 'FC' = 5 (05 )
H
- Turn on/off a coil (bit data) by specifying only a bit.
- For the assignment of a coil (bit data), see Table 3.5. For each content, refer to the S and M
codes in the remarks column.
Coil
+7 +6
number
1 X6 X5
9 RST XR
- The "−" symbol in the table means that the bit is reserved, and writing is ignored.
- The coil address is 0 to 15, calculated by subtracting one from the coil number. If a coil
address is 16 or more, an error occurs because of an incorrect address.
- When a coil is turned off, data are 0000
Interpretation of normal response
- The format of normal response is the same as that of inquiry.
- No response is returned to the broadcast command.
Bit 6 Bit 5
INT EXT
0 0
2 bytes 2 bytes
Data
Lo Hi Lo
2 bytes 2 bytes
Data
Table 3.5 Description of coil (bit data)
+5 +4 +3
X4 X3 X2
− −
XF
. When a coil is turned on, data are FF00
H
3-9
Bit 4 Bit 3 Bit 2
REV FWD RST
0 0 0
2 bytes
Error check
2 bytes
Error check
+2 +1 +0
S06: Run operation
X1 REV FWD
− −
X7
3.1 Messages
Bit 1 Bit 0
XR XF
0 NUV
Remarks
command
(Read/Write)
.
H