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Modbus / Gas Water Heaters
MODBUS / GAS WATER HEATERS
Figure 37. Cyclone® Xi Commercial Water Heaters (Virtual Modbus device via ICC Gateway)
PRODUCT DESCRIPTION
Cyclone
®
Xi water heaters are designed for commercial hot water applications. The Xi controls provide easy to read, plain English
configuration and diagnostics. All Xi controls provide communications via propriety protocol with the ICC Gateway. The XLTR-1000
supports Modbus RTU communications and the ETH-1000 supports Modbus/TCP to access data available at the display plus control of
limited number of points such as Operating Setpoint.
MODBUS GAS WATER HEATER REGISTER LISTINGS
Modbus Gas Water Heater Register Properties
•
Not all models support all registers. Xi 1.0 or MXi noted where exclusively used on those models.
• This table may be subject to change in the future.
•
Adjustable objects are in bold and indicated by “W” (writable).
Table 38. ModBus Gas Water Heaters Register List
Register Name
(Description)
Register Type Address R/W
Units
Min
Value
(if W)
Max
Value
(if W)
Firmware Ver-Rev
1
(Firmware Version)
Input Register 1
R
Configuration
Input Register 2
R
1. Data is Version encoded into the upper 8 bits and Revision (Lower 8 bits).
2. This limits modulation to maximum EMS Percent Commanded. 100% = Allow up to rated firing (faster recovery). 0% =
minimum modulation rate more efficient but has a slower recovery rate i.e. derates heater capacity).
3. MXi only: Due to hardware design MXi cannot detect switch state when in fault condition and will read 0. In standby any
switch of lower in the limit string than an open switch above it will also appear open. Limit string order is Low Gas Pressure,
Blocked Exhaust, Blocked intake and Blower prove.
4. Data stored in two 16 bit registers “Big Endian” (Higher order bits in lower register number)
5. Hours and Days used together derived from Time (hours x 100). i.e. Elapsed Time of 13612.24 hours in “Days” and
“Hours” = 567 days, 4 hours.
Summary of Contents for Mirius
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