User`s manual

12
FX communication
Diagnostics 12
12-7
12.6 FX
2N
-232IF
12.6.1 Error code
When an error occurs while data is sent or received, BFM #28 b3 is set to ON and the error code
is saved in BFM #29.
12.6.2 Diagnostics
1 ) Check the status of the POWER LED provided in the FX
2N
-232IF.
• When it is Lit, the power source is correctly supplied.
• If it is extinguished, supply from the power source correctly.
2 ) Check the status of the SD LED and the RD LED provided in the FX
2N
-232IF.
• If the RD LED is not Lit while data is received or the SD LED is not Lit while data is sent,
check the installation and the wiring.
• When the RD LED is Lit while data is received or the SD LED is Lit while data is sent, the
installation and the wiring are correct.
3 ) Make sure that the communication setting (BFM #0) of the FX
2N
-232IF is equivalent to that of
the external equipment. If they are not equivalent each other, make them equivalent.
4 ) Make sure the timing of data send/receive. For example, make sure that the counterpart
equipment is ready for receive before starting to send data to it.
5 ) When the terminator is not used, check whether the send data capacity is equivalent to the
acceptable data capacity. If the send data capacity may be changed, use the terminator.
6 ) Make sure that the external equipment is correctly operating.
7 ) Check whether the type of send data and the type of receive data are equivalent. If they are
different, make them equivalent.
Code Description Causes and countermeasures
0 No error

1
Receive parity error, overrun error, framing
error
Communication format such as baud rate is not
matched.
Control timing is not matched.
2 Undefined

3 Defective receive character Receive data is not ASCII code.
4 Receive sum check error
Receive sum is not equal calculated sum result
(BFM #16).
5
Receive buffer overflow (only in interlink
connection mode)
Receive byte count exceeds 512+30 bytes.
Decrease receive upper byte count (BFM #2),
and increase spare receive buffer area.
6 Baud rate setting error Non-existing baud rate is specified.
7 Receive CR error CR is not placed in correct position.
8 Receive LF error LF is not placed in correct position.
9 Send/receive initial terminator setting error Initial terminator is other than 01H to 1FH.
10 Receive terminator error
Receive terminator is not placed in correct
position or not matched.
11 Undefined

12 Transmission sequence error Transmission sequence is not matched.