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NAVIPASS Modbus - Accessory
Code
Error
0A
Gateway path unavailable
0B
Gateway target device failed
to respond
04
Server device failure
3.4.5.
Navipass Modbus troubleshooting diagram
Navipass right LED on steady green
+ occasional orange flashing?
Resume wiring
boiler side (X7)
- Reverse wiring A and B
- Check Navipass addressing
- Check communication speed (customer)
- Reset Navipass communication parameter
Example of reading of the generator starting temperature (43.1°C):
Sending frame:
Adress of the
interface in
Modbus
Hexa
[02]
Decimal
[2]
Explanation Adress N°2
For the Modip
Navipass
Frame received:
Adress of the
interface in
Modbus
Hexa
[02]
Decimal
[2]
Explanation Adress N°2
For the Modip
Navipass
60 / 202
• the interface is not configured
• the boiler is not responding
• for all other errors
No
Yes
Left LED flashes at
customer questioning?
No
Yes
Response Time Out :
- Increase Time Out
on the client PLC
- Read register 8
Error message :
- Check the register questioned
- Check the number of registers queried
- Error 8, replace with current Navipass version
- Analyze the frames exchanged
- Error 2, occurrence if screen value at ---
Modbus
function used
[03]
[3]
type of request
(reading)
Modbus
function used
[03]
[3]
type of request
(reading)
Cause
Inconsistent values:
- Check data format setting (U8, U16, S8, S16 etc.)
- Check the value on the boiler screen (probe not connected, etc.)
- Check consistency on chapter 8
- Increase the interframe delay
- Reduce the bus load by disconnecting the other slaves
- - Analyze the frames exchanged
Requested
Number of
Modbus register
consecutive
number
registers read
[00] [6F]
[00] [01]
[111]
[1]
Flow T°
Reading on 1
register
register
number (see
exchange
table)
Nb of bytes
Register value
read
[02]
[01] [AF]
[2]
[431]
2 bytes per
Reading of
register read
parameter 431
corresponding
to 43.1 ° C
CRC
[B4] [24]
[46116]
Automatic
generated
security code
CRC
[BD] [A8]
[48552]
Automatic
generated
security code
00ANO0019-G_EN
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