E1..E4
d1
d2
d3
d4
Identi-
fier
000..063
AC500-
Display
<− Display in
Class
Comp
Dev
Mod
Ch
Err
PS501
PLC
Browser
Byte 4
Bit 6..7
-
Byte 1
Byte 2
Byte 3
Byte 4
Bit 0..5
PNIO
diag-
nosis
block
Class
Inter-
face
Device
Module
Channel Error-
Identi-
fier
Error message
Remedy
1
)
2
)
3
)
4
-
1...10
31
5
8
I/O module
removed from hot
swap terminal unit
or defective module
on hot swap ter-
minal unit
9
)
Plug I/O
module,
replace
I/O
module
4
-
1...10
31
5
28
Wrong I/O module
plugged on hot
swap terminal unit
9
)
Remove
wrong
I/O
module
and plug
pro-
jected
I/O
module
4
-
1...10
31
5
42
No communication
with I/O module on
hot swap terminal
unit
9
)
Replace
I/O
module
4
-
1...10
31
5
54
I/O module does
not support hot
swap
8
)
9
)
Power
off
system
and
replace
I/O
module
4
-
1...10
31
6
8
Hot swap terminal
unit configured but
not found
Replace
terminal
unit by
hot swap
terminal
unit
4
-
1...10
31
6
42
No communication
with hot swap ter-
minal unit
9
)
Restart,
if error
persists
replace
terminal
unit
4
-
31
31
31
46
Voltage feedback
on activated digital
outputs DO0...DO7
on UP3
4
)
Check
terminals
Device specifications
Communication interface modules (S500) > Modbus
2022/01/31
3ADR010278, 3, en_US
757
