IB ST (ZF) 24 PT 100 4/4
8 5080C
Error Messages
In normal mode, every process data input word
contains the temperature value of the
corresponding channel. When an error occurs
on a channel or module, a code is written to the
corresponding input word that indicates the error
cause.
If the value E0xxh occurs in the
process data this is not a measured
value but an error message.
Figure 7 Bit assignment of the error code
Checking the Supply Voltage
The I/O supply voltage is permanently
monitored. If the voltage value is outside the
predefined range a module error message is
released. The error code E008
hex
is entered into
the process data input words instead of the
temperature values.
Checking the Data in the Non-Volatile
Memory
The configuration is not stored in the volatile
memory of the EEPROM. If the configuration of
the EEPROM is invalid, a module error message
is released and the error code E002
hex
is written
to all process data input words.
Monitoring Converter Activities
A timeout function checks the analog to digital
converter (ADC). If the ADC fails, a module error
message is released and the error code E010
hex
is entered in all process data input words.
15 14
13
12
11
10
9
87
65
4
3
2
10
Bit
Open circuit
5080C 009
E0
hex
R e a d e rro r in E E P R O M
O ut of m easuring range
Supply voltage U
S
not present
AD C defective
Invalid configuration
Reserved
