IDEC FC4A-C10R2 User Manual page 289

Conversion Type
The BCC calculation result can be converted or not according to the designated conversion type as described below:
Example: BCC calculation result is 0041h.
(1) Binary to ASCII conversion
0041h
(2) No conversion
0041h
BCC Digits (Bytes)
The quantity of digits (bytes) of the BCC code can be selected from 1 or 2.
Example:
(1) BCC digits = 2
(34h)
(2) BCC digits = 1
(34h)
Transmit Completion Output
Designate an output, Q0 through Q107, or an internal relay, M0 through M1277, as an operand for the transmit completion
output. Special internal relays cannot be used.
When the start input for a TXD instruction is turned on, preparation for transmission is initiated, followed by data trans-
mission. When a sequence of all transmission operation is complete, the designated output or internal relay is turned on.
Transmit Status
Designate a data register, D0 through D1298 or D2000 through D7998, as an operand to store the transmit status informa-
tion including a transmission status code and a user communication error code.
Transmit Status Code
Transmit
Status Code
16 Preparing transmission
32 Transmitting data
48 Data transmission complete
64 Transmit instruction complete
If the transmit status code is other than shown above, an error of transmit instruction is suspected. See User Communica-
tion Error Code on page 17-27.
Binary to ASCII conversion
No conversion
"4" "1"
(31h)
"4" "1"
(31h)
Status
« FC4A M
17: U
ASCII data
"4" "1"
(34h) (31h)
2 digits
ASCII data
NUL "A"
(00h) (41h)
2 digits
ASCII data
"4" "1"
(34h) (31h)
"1"
Lower digit
(31h)
From turning on the start input for a TXD instruction, until the transmit
data is stored in the internal transmit buffer
From enabling data transmission by an END processing, until all data
transmission is completed
From completing all data transmission, until the END processing is
completed for the TXD instruction
All transmission operation is completed and the next transmission is
made possible
S U ' M
ICRO MART SER S ANUAL
C
SER OMMUNICATION
Note: On WindLDR, Modbus ASCII is
defaulted to binary to ASCII conversion.
Note: On WindLDR, Modbus RTU is
defaulted to no conversion.
Note: On WindLDR, Modbus ASCII and
Modbus RTU are defaulted to 2 digits.
Description
»
I
NSTRUCTIONS
17-11