Instruction Manual

21
Publication 1790-IN010B-EN-P - April 2003
RTD and Thermocouple Blocks - I/O Channel LED Status Indicator
Status: Description:
Flashing Green/Red Power up
Off Off line
Red On line and no field power
Red PROFIBUS connection and no field power
Flashing Red Field power and open wire
Green Field power and valid input
Flashing Red Input over range
Flashing Red Input under range
Flashing Red Recoverable fault
I/O Channel LED Status Indicator
1790D-TN4C0 1790D-TN0C2
Status: Description: Status: Description:
Flashing Green/
Red
Power up Flashing Green/
Red
Power up
Off Off line Off Off line
Red On line and no field
power
Off On line and no field
power
Red PROFIBUS connection
and no field power
Green PROFIBUS connection
and no field power
Flashing Red
1
Field power and open
wire (4-20mA range
only)
2
Green Field power and open
wire
Green Field power and valid
input
Green Field power and valid
output
Green Input over range Flashing Red Field power and
output out of range
Flashing Red
1
Input under range
<3mA (4-20ma
range only)
2
Flashing Green Output idle
Flashing Red Recoverable fault Flashing Red Recoverable fault
1
Green for 0-20mA range.
2
Can be determined from the data table.