14
92-8%((6)77
There are two methods to program the unit address when the programmer module is connected to the
E500 via the RS485 interface:
1IXLSH3RI)(HMWTPE]SRP]
1.
Press the SCRL key until the screen displays PROGRAM SETUP
2.
Press the MODE key and the screen displays PROGRAMMER EP160 (or appropriate model).
3.
Press the SCRL key until the screen displays UNIT ADDRESS #00 (or appropriate address).
4.
Every time the RESET key is held down for 1 second and then released will increase the address
by one.
5.
Maximum address is 31. Then the address will roll over to 00.
1IXLSH8[S)(SV)(
1.
Make sure the control is not in a lockout condition. If so, press the reset button.
2.
Open the operating control (term L1-13).
3.
Move the “Check-Run” switch to the Check position.
4.
The display will indicate Unit Address 00 (or the current address).
5.
Every time the reset button is held down for 1 second and then released will increase the address
by one.
6.
Maximum address is 31. Then the address will roll over to 00.
*0%1)132-83613(&97'31192-'%8-327
The protocol to be used is Modbus RTU. This is implemented by the master (PC, PLC, etc.) issuing a
poll to the slave (Flame-Monitor) and the slave responding with the appropriate message.
A typical format of a poll request is as follows:
DST refers to the logical address of the slave.
FNC is the function being requested. FNC 03 is a read request.
ADR is the message number or register number of the data being requested. In Modbus, register
addresses begin at 40001 but is interpreted as address 00.
DAT is the number of words being requested. A word is an integer consisting of 2 bytes.
The normal response from a slave is as follows:
DBC is the data byte count being returned. It must be two times the DAT number from the poll
request.
DATA is the data returned and is always a series of 2 byte integers. If 4 words were requested then
DBC would be 8 and there would be 8 data bytes or 4 data words containing the requested data.
The format of the data is 4800,N,8,1 meaning 4800 baud, no parity, and 1 stop bit.
Below is a table of currently available messages provided by the Flame-Monitor programmers, fol-
lowed by a description where necessary.
(78
*2'
%(6
,-
%(6
03
(%8
,-
(%8
03
'6'
03
'6'
,-
(78
*2'
(&'
(%8%g
,-03
'6'
03
'6'
,-
