439
End Codes
Section 6-2
6-2
End Codes
6-2-1
Codes
The response (end) codes listed in the following table are returned in the
response frame for Host Link commands. When two or more errors occur, the
end code for the first error will be returned.
End
code
Contents
Probable cause
Corrective measures
00
Normal completion
No problem exists.
---
01
Not executable in RUN mode The command that was sent cannot be exe-
cuted when the PC is in RUN mode.
Check the relation between the
command and the PC mode.
02
Not executable in MONITOR
mode
The command that was sent cannot be exe-
cuted when the PC is in MONITOR mode.
03
UM write-protected
The PC’s UM is write-protected.
Turn OFF pin 1 of the CPU Unit’s
DIP switch (SW1).
04
Address over
The program address setting in an read or
write command is above the highest program
address.
Check the program.
13
FCS error
The FCS is wrong.
Check the FCS calculation
method. If there was influence
from noise, transfer the command
again.
14
Format error
The command format is wrong, or a com-
mand that cannot be divided has been
divided, or the frame length is smaller than
the minimum length for the applicable com-
mand.
Check the format and transfer the
command again.
15
Entry number data error
The data is outside of the specified range or
too long.
Hexadecimal data has not been specified.
Correct the data and transfer the
command again.
16
Command not supported
The operand specified in an SV Read or SV
Change command does not exist in the pro-
gram.
Check search data or the search
starting point.
18
Frame length error
The maximum frame length of 132 bytes was
exceeded.
If the frame exceeds 280 bytes, the Reception
Overflow Flag will be turned ON and there will
not be a response.
Check the command and divide it
into multiple frames if necessary.
19
Not executable
The read SV exceeded 9,999, or an I/O mem-
ory batch read was executed when items to
read were not registered for composite com-
mand.
Register items to read before
attempting batch read.
23
User memory protected
The UM is write-protected.
Turn OFF the write-protection
A3
Aborted due to FCS error in
transmission data
An FCS error occurred in the second or later
frame, or there were two bytes or less of data
in an intermediate or final frame for multiple
writing.
Correct the command data and
transfer the command again.
A4
Aborted due to format error
in transmission data
The command format did not match the num-
ber of bytes in the second or later frame.
A5
Aborted due to entry number
data error in transmission
data
There was an entry number data error in the
second or later frame, a data length error, or
data was not set in hexadecimal.
A8
Aborted due to frame length
error in transmission data
The length of the second and later frames
exceeded the maximum of 128 bytes.
