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LubriMist
®
Model JD
Oil Mist Generating System
Installation and Operating Manual
Page 84 of 152
Address
(HEX)
Length
Breakdown of each Function Code and it’s HEX Addresses
Coil status
:
Function Code 01, this refers to the Digital Outputs on the JD.
For a description of the digital outputs refer to (
Coil Status Addresses
) below.
Message frame being sent
[01] [01] [00] [00] [00] [01] [fd] [ca]
1) Device I.D. in
modscan screen has to
be the same as the JD
location
2) In the Modscan
screen MODBUS point
type & Function code are
the same thing.
3) Data sent out,
consisting of address
(hex) and length
4) Cyclical Redundancy
Checking or CRC
[01]
[01]
([00] [00]) ([00] [01])
[fd] [ca]
1) Device I.D.--- [01] has to be the same as the JD I.D. (also known as the Slave Address).
2) Modbus point type or function code ---- selecting 01 (Coil Status) from the Modscan screen will determine
which values or parameters will be viewed. This is where the function code shows up in the message frame.
3) Data sent---will consist of 2 sets of data ([00] [00]), ([00] [01]), the first two sets of numbers [00] [00] are
the address (hex), meaning (Mist tank level, Air heater, Air pre-heater, etc).
Remember:
In the Modscan screen Address (hex) 0001 means 00 in the message frame, 0002—01, etc.
Only one output status value can be polled at anyone time using this format, to view a value, type in the
address in the Modscan screen address (hex) box.
See Coil Status addresses below.
The second set of numbers [00] [01] are the (length). In Coil Status, only one value can be polled at a time, it
is recommended to leave the length at 1 when working in Coil Status for this format.
4) Cyclical Redundancy Check--- CRC [fd] [ca], is a number assigned by the computer and cannot be
changed by the user.
Function code 01—in Modscan screen the address (hex) and the length cannot exceed 11
Or an error will occur in the receiving information from the JD in the form of ([01] [81] [00] [40] [50]), the [81]
being the error code.
Coil Status Addresses;
There are only 6 addresses (HEX) available in coil status.
Address (HEX) Message frame address Description
01
=
00
---
Mist Tank oil Level Air Solenoid
02
=
01
---
Air Heater Element Control
03
=
02
---
Air Pre-heater Element Control
04
=
03
---
Demist Module Motor Starter
05
=
04
---
Overhead light
06
=
05
---
Bulk Oil Tank Fill Solenoid
Message frame being received
Coil Status, Function code 01, this data will come from the Digital Outputs of the JD.
([01] [01] [01] [02] [d0] [49]).
1) Device I.D. in
Modscan screen has to
be the same as the JD
location
2) In the Modscan
screen Modbus point
type & Function code are
the same thing
3) Data Received,
consisting of length and
the status being polled
4) Cyclical Redundancy
Checking or CRC
[01]
[01]
([01]) ([02])
[d0] [49]
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