Watlow EZ-ZONE RUI/Gateway - Manual (Page 45)

Watlow EZ-ZONE ® RUI/Gateway • 42 • Chapter 5 Networking with a Gateway
Saving Settings to Non-volatile Memory
When save to EEPROM is enabled, values are saved
once every five seconds if a value written has changed.
if the EEPROM is disabled, any changes from the key-
pad that cause a change in the controller will initiate
a save of all values.
If controller settings are entered from the front
panel (PM) or via an RUI, changes are always saved to
non-volatile memory (EEPROM) in the controller (RM,
PM or ST). If the controller loses power or is switched
off, its settings will be restored when power is reap-
plied.
The EEPROM will wear out after about 1,000,000
writes, which should not be a problem with changes
made from the panel or RUI. However, if the controller
is receiving data from a Master device on a network
such as a PLC via the gateway, the EEPROM could
over time, wear out.
By default, settings made over Standard Bus (Com
instance 1) via the gateway or front panel of the RUI
are saved to EEPROM. Whenever new information
is sent from these devices, e.g., new set point, new
control mode, etc... a write to EEPROM will occur. No
further writes to EEPROM will occur until the input
data changes again. This would be true over a network
(Com instance 2) as well. If the data is changing it
will be written to the EEPROM. If it is desired to in-
hibit writes to the EEPROM over a network, write the
value of 59 to the addresses in the controllers specified
below.
Note:
This is an individual operation on each EZ-ZONE
controller on the Standard Bus side of the network.
CIP (DeviceNet and EtherNet/IP) by Con-
troller Type
For the following controllers:
RMC, RMS, RML, RMH, ST and PM-PID
Class = 150
Instance = 1
Attribute = 8
RMA
Class = 150
Instance = 2
Attribute = 8
PMI and PML
Class = 150
Class = 150
Instance = 1 Instance = 2
Attribute = 8 Attribute = 8
Modbus Registers by Controller Type
PMI and PML
Instance 1 Instance 2
Map 1 = 2494 Map 1 = 2514
Map 2 = 2974 Map 2 = 2994
PID
Instance 1
Map 1 = 2494
Map 2 = 2974
ST
Map 1 = 317
Map 2 = 2064
RMC RMA RMS RML RMH
2834 444 3474 3504 6514
Profibus by Controller Type
RMC, RML, RMH, PML, PMI and PID
198
RMS
112
RMA
82
Enumerated values for this member follows:
Yes = 106 (allow writes to EEPROM), No = 59 (Disable
writes to EEPROM)
Note:
Some controllers have only 1 communications port
where this discussion would apply if connected to
an RUI/GTW or RMA module. Other controls like
the PMI and the PML can have 2 communications
ports therefore you will find 2 instances. This setting
relates to the controller the RUI/GTW is connected
to, not the RUI/GTW itself. Everything changed in
the RUI/GTW, either via EZ-ZONE Configurator
software or from the front panel will be saved to the
EEPROM in the RUI/GTW.