Watlow EZ-ZONE
®
PM PID Controller
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Chapter 4 Home Page
It should also be noted that some of the cells in the
Modbus column contain wording pertaining to an off-
set. Several parameters in the control contain more
than one instance; such as, profiles (4), alarms (4),
analog inputs (2), etc... The Modbus register shown
always represents instance one. Take for an example
the Alarm Silence parameter found in the Setup
Page under the Alarm menu. Instance one of Map 1
is shown as address 1490 and +50 is identified as the
offset to the next instance. If there was a desire to
read or write to instance 3 simply add 100 to 1490 to
find its address, in this case, the instance 3 address
for Alarm Silence is 1590.
To learn more about the Modbus protocol point your
browser to http://www.modbus.org.
Note:
There are two columns shown in the menus that fol-
low for communications protocols identified as CIP
(Common Industrial Protocol) and Profibus. These
columns will be useful if this control is used in con-
junction with the EZ-ZONE Remote User Interface/
Gateway where those protocols can be selected as
optional hardware. For this control, as a secondary
protocol beyond Standard Bus, Modbus RTU can be
ordered as optional hardware.
To learn more about the RUI/GTW point your
browser to the link below and search for keyword EZ-
ZONE.
http://www.watlow.com/literature/pti_search.cfm
