DeLUX MOISTURE Link G2 DP, Руководство по эксплуатации

Страница: 275 / 322

30

Message 26 returns the current operating status as well as stored burner hours and burner cycles as a
snapshot of the entire MicroM system. When all 9 words are requested, the data returned consists of
STATUS, MSGN, FLAME, INPUTS, OUTPUTS, BNRMINS, and BNRCYCS.
The MSGN being transmitted is a numerical value and must be interpreted by the communicating
device, which actually is an advantage since this can be made to be whatever message text the end
user wants. In other words, it allows for programming custom messages without actually changing
the message in the programmer.
The MicroM stores its burner on time (Terminal 5 powered) and system on time (L1 powered) in
minutes. Internally, the programmer converts this to hours for display purposes, however the result is
rounded down. The information being supplied by Modbus will be the actual time in minutes and it
is up to the communicating device to do the conversion. Since the maximum value stored in the
MicroM is 9,999,999 minutes, the maximum value in hex therefore, is 98967FH and comprises of
two data words. The maximum cycle count is 999,999 decimal or 0F423FH, still two data words. As
an example, the System on Minutes data is transmitted from the MicroM to the interface as high
word / low word as shown below:
Note: Data from address 9 cannot be accessed directly.
All values are represented in a HEX or base 16 format.
GSTAT determines the type of value TIMER represents. TIMER can be a running timer such as is
used in purge, a flame signal or meaningless. Only the lower nibble of GSTAT has any value. If this
value is 0 then the TIMER value has no meaning. The value in TIMER is a background minute timer
in the MicroM and should be ignored. If GSTAT is between 4 and 7, the TIMER represents the cur-
rent value flame signal. If GSTAT is a 1, 2, or 3 then TIMER represents a running timer value.
The baud rate of the MicroM is fixed at 4800 bits per second. The format of the data is 8 data bits, no
parity and 1 stop bit. Due to the RS485 format, the communication format is considered half-duplex.
That is, only one user is permitted on the communication lines at a time.
The information contained in INPUTS and OUTPUTS represents the status of the interlocks and
relays respectively. For the INPUTS, a 1 in the interlock position defines the interlock as being on or
energize where the 1 in any bit position in the OUTPUT register signifies the relay as being ener-
gized.
Reset, Scrl and Mode represent the keypad located on the ED510 display. A ‘0’ in any of these posi-
tions indicates the switch is depressed. A ‘1’ in the opto-coupler position indicates the opto-coupler
is on or interlock closed.
A ‘1’ in any terminal position indicates the relay is energized. Term 4 indicates the state of K1 relay,
located in the MEP500 series programmers.
MESSAGE ADDRESS 8 MESSAGE ADDRESS 9
HIGH WORD LOW WORD
HIGH BYTE LOW BYTE HIGH BYTE LOW BYTE
0 98H 96H 7FH
INPUTS
Term 5 Term 3 Term 6 Term 7
Reset Scrl Mode RF Pilot Intrlck OpCntrl Ref
OUTPUTS
Term 8 Term A Term 3 Term 5 Term 4
N/A N/A N/A Blower Alarm Pilot Main Fuel MTFI