Watlow EZ-ZONE
®
PM Integrated Controller • 37 • Chapter 4 Home Page
Conventions Used in the Menu Pages
To better understand the menu pages that follow
review the naming conventions used. When encoun-
tered throughout this document, the word "default"
implies as shipped from the factory. Each page (Op-
erations, Setup, Profile and Factory) and their associ-
ated menus have identical headers defined below:
Header Name Definition
Display
Visually displayed infor-
mation from the control.
Parameter Name
Describes the function of
the given parameter.
Range
Defines options available
for this prompt, i.e., min/
max values (numerical),
yes/no, etc... (further ex-
planation below).
Default
Values as delivered from
the factory.
Parameter Appears
in Menu When
Conditions required for
parameter to appear in
menu.
Modbus Relative Ad-
dress
Identifies unique param-
eters using either the
Modbus RTU or Modbus
TCP protocols (further ex-
planation below).
CIP (Common Indus-
trial Protocol)
Identifies unique param-
eters using either the De-
viceNet or EtherNet/IP
protocol (further explana-
tion below).
Data Type R/W
uint = Unsigned 16 bit
integer
dint = Signed 32-bit,
long
string = ASCII (8 bits
per character)
float = IEEE 754 32-bit
RWES = Readable
Writable
EEPROM (saved)
User Set (saved)
Display
Visual information from the control is displayed to
the observer using a fairly standard 7 segment dis-
play. Due to the use of this technology, several char-
acters displayed need some interpretation, see the
list below:
1 = 1 0 = 0 i = i r = r
2 = 2 a = A j = J S = S
3 = 3 b = b H = K t = t
4 = 4 c, C = c l = L U = u
5 = 5 d = d m = M u = v
6 = 6 e = E n = n w = W
7 = 7 f = F o = o y = y
8 = 8 g = g p = P 2 = Z
9 = 9 h = h q = q
Range
Within this column notice that on occasion there will
be numbers found within parenthesis. This number
represents the enumerated value for that particular
selection. Range selections can be made simply by
writing the enumerated value of choice using any of
the available communications protocols. As an exam-
ple, turn to the Setup Page and look at the Analog
Input [`Ai] menu and then the Sensor Type [Sen]
prompt. To turn the sensor off using Modbus sim-
ply write the value of 62 (off) to register 400369 and
send that value to the control.
Communication Protocols
When using a communications protocol in conjunc-
tion with the EZ-ZONE PM there are two possible
ports (instances) used. Port 1 or instance 1 is always
dedicated to Standard Bus communications. This
same instance can also be used for Modbus RTU if
ordered. Depending on the controller part number
port 2 (instance 2) can be used with Modbus, CIP
and Profibus. For further information read through
the remainder of this section.
Modbus RTU & TCP Protocols
All Modbus registers are 16-bits and as displayed
in this manual are relative addresses (actual). Some
legacy software packages limit available Modbus reg-
isters to 40001 to 49999 (5 digits). Many applications
today require access to all available Modbus regis-
ters which range from 400001 to 465535 (6 digits).
Watlow controls support 6 digit Modbus registers.
For parameters listed as float notice that only one
(low order) of the two registers is listed, this is true
throughout this document. By default the low order
word contains the two low bytes of the 32-bit param-
eter. As an example, look in the Operations Page for
the Process Value. Find the column identified in the
header as Modbus and notice that it lists register
360. Because this parameter is a float it is actually
represented by registers 360 (low order bytes) and
361 (high order bytes). Because the Modbus specifi-
To Next Page
Loading...
