Models FL3100H/3101H
43
5.7.39 HART Current (2E)
Normally in HART mode the low current does not go below 3.5 mA. In order for the current to
distinguish between COPM Fault and Fault there is a HART setting that allows the current to go
as low as 1.25 mA. A read returns “1” or “0”.
Condition
Normal HART Current
HART Expanded Scale
Units
Run
4 ,8, 12,16, 20
4 ,8, 12,16, 20
mA
COPM Fault
3.5
2.0
mA
Fault
3.5 1.25
mA
5.7.40 Comm 2 Address (2FH)
A read returns the Comm 2 address of the FL3100H / FL3101H. A write changes the address
to the requested address. The range of the address is 1 to 247 (01 to F7 Hex). After the
address has been changed to the slave unit, the Modbus communications will cease because
the address has changed. Therefore, the master will have to change its query address to the
slave’s new address in order to restart communications.
EXCEPTION -
If an illegal data value is entered which is not listed above, then the Exception
Code 03 (Illegal Data Value) is returned.
NOTE:
By grounding the RESET input during power-up cycle (approximately 10 seconds), the
FL3100H / FL3101H Address defaults to 2.
5.7.41 Comm 2 Baud Rate (30H)
A read returns the Comm 2 baud rate of the FL3100H / FL3101H. A write changes the baud
rate to the requested baud rate. After the baud rate has been changed to the addressed unit,
the Modbus communications ceases because the baud rate has changed. Therefore, the
master will have to change its baud rate to the slave’s new baud rate in order to restart
communications.
Baud
Rate
Low Data
Byte
Access
19.2K 03 Read/Write
9600
02
Read/Write
4800 01 Read/Write
2400
00
Read/Write
Table 30: Comm 2 Baud Rate
This function is indicated on the Low Data Byte (the High Data Byte is not used).
EXCEPTION -
If an illegal data value is entered which is not listed above, then the Exception
Code 03 (Illegal Data Value) is returned.
Summary of Contents for FL3101H
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