21
NT538
ERROR CODES (exception codes)
In case of a wrong request, ModBus will answer with modified codes and codified errors according to the following:
1: - Unsupported function code
2: - Wrong data address
3:
- Wrong data (for instance length)
The memory area containing the HFN datum must undergo no forcing.
In the case in which all the fans are turned off (F1, F2) the test of the relay will not take place.
GENERAL UNIT NOTE
The models of the unit can be equipped with different options ; to avoid disruption of production , their existence is defined
by Fw indicated power , with messages dedicated on display LEDs .
This information can be accessed by reading the Modbus register 6 ( options ) with the following meaning :
LOW Byte
Bit_0 = 4.20mA output
Bit_2/3 = 11 – Tipe of sensors PT100
Bit_4 = RS485 output
HIGH Byte
Bit_0/1 = 00 - Range 0°C - 240°C
Bit_0/1 = 10 - Range -40°C ÷ +200°C
In case of Ethernet option Modbus and 4.20mA mode shall not be active on the display. They will be readable from the log.
Note: in case the values programmed from ModBus are out of range, it will generate a "exeption" error response to
date.
ILLEGAL DATA
On the other hand, some combinations are programming errors because they are wrong settings; in this case the error
code is ILLEGAL_DATA. This information is accessible to ModBus reading the register 7.
NO ERROR
CH_1 Trip ≤ Alarm
CH_2 Trip ≤ Alarm
CH_3 Trip ≤ Alarm
CH_4 Trip ≤ Alarm
CH_5 Trip ≤ Alarm
CH_6 Trip ≤ Alarm
CH_7 Trip ≤ Alarm
CH_8 Trip ≤ Alarm
FAN_1 ON ≤ OFF
FAN_2 ON ≤ OFF
No channels enabled
Value HFN > max see table: SYSTEM - Setting and Status
Value FCD > max see table: SYSTEM - Setting and Status
Value DAC > max see table: SYSTEM - Setting and Status
Value Voting > max see table: SYSTEM - Setting and Status
Voting wrong function ( channels not enabled)
Note. If the value of Voting is higher than the max value expected for the model in question, it will be set equal to "0", that is
NO_VOTING.
POLLING FREQUENCY
We recommend polling frequencies equal to or greater than 1 second are adopted.
More frequent polling can overload the system without any benefit whatsoever.
No error 00
Code error 01
Code error 02
Code error 03
Code error 04
Code error 05
Code error 06
Code error 07
Code error 08
Code error 017
Code error 018
Code error 019
Code error 020
Code error 021
Code error 022
Code error 023
Code error 024
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