User guide

Watlow EZ-ZONE
®
RMH Module • 35 • Chapter 2 Menu Conventions
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 and Factory) and their associated
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.
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).
Profibus Index
Identifies unique param-
eters using Profibus DP
protocol (further explana-
tion below).
Parameter ID
Identifies unique param-
eters used with other soft-
ware such as, LabVIEW.
Data Type R/W
uint = Unsigned 16 bit
integer
dint = long, 32-bit
string = ASCII (8 bits
per character)
float = IEEE 754 32-bit
RWES = Readable
Writable
EEPROM (saved)
User Set (saved)
Remote User interface (RUI) 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
Note:
The RUI is optional equipment.
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 ex-
ample, 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 simply write the value
of 62 (off) to Modbus register 388 and send that value
to the control.
Communication Protocols and Software Tools
All RM modules come with Watlow's Standard
Bus protocol. This protocol is used primarily for
inter-module communications but is also used with
SpecView by Watlow, LabVIEW and EZ-ZONE Con-
figurator software (free download from Watlow's web
site (http://www.watlow.com). Along with Standard
Bus, the RMH module can also be ordered with Mod-
bus RTU (only one protocol can be active at any given
time). The RMA (Access) module has options for sev-
eral different protocols listed below:
- Modbus RTU 232/485
- EtherNet/IP, Modbus TCP
- DeviceNet
- Profibus DP
Modbus RTU Protocol
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 registers
which range from 400001 to 465535 (6 digits). Wat-
low EZ-ZONE controllers support 6 digit Modbus reg-
isters. 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 or-
der word contains the two low bytes of the 32-bit pa-
rameter. As an example, look in the Operations Page
for the Process Value. Find the column identified in