Modbus - using programmable memory blocks – Watlow EZ-ZONE RM-Scanner-Modul User Manual
Page 94
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Watlow EZ-ZONE
®
RMS Module
•
91
•
Chapter 6 Features
a. If the the Rolling Password is off push the Ad-
vance key one more time where the Password
[pass] prompt will be displayed. Proceed to
either step 7a or 8a. Pushing the Up ¿ or Down
¯ arrow keys enter either the User or Adminis-
trator Password. Once entered, push and hold
the Infinity ˆ key for two seconds to return to
the Home Page.
b. If the Rolling Password [roll] was turned on
proceed on through steps 3 - 9.
3. Assuming the Code [Code] prompt (Public Key)
is still visible on the face of the control simply
push the Advance key
‰
to proceed to the
Password
[ pass]
prompt. If not find your way
back to the Factory Page as described above.
4. Execute the calculation defined below (7b or 8b)
for either the User or Administrator.
5. Enter the result of the calculation in the upper
display play by using the Up ¿ and Down ¯ arrow
keys or use EZ-ZONE Confgurator Software.
6. Exit the Factory Page by pushing and holding the
Infinity
ˆ
key for two seconds.
Formulas used by the User and the Administrator to
calculate the Password follows:
Passwords equal:
7. User
a. If Rolling Password [roll] is Off, Password
[pass] equals User Password [pas;u].
b. If Rolling Password [roll] is On, Password
[pass] equals:
([pas;u] x code) Mod 929 + 70
8. Administrator
a. If Rolling Password [roll] is Off, Password
[pass] equals User Password [pas;a].
b. If Rolling Password [roll] is On, Password
[pass] equals:
([pas;a] x code) Mod 997 + 1000
Differences Between a User Without Password,
User With Password and Administrator
- User without a password is restricted by the
Locked Access Level [loC;l].
- A User with a password is restricted by the
Read Lockout Security [rloC] never having ac-
cess to the Lock Menu [`loC].
- An Administrator is restricted according to the
Read Lockout Security [rloC] however, the Ad-
ministrator has access to the Lock Menu where
the Read Lockout can be changed.
Modbus - Using Programmable Memory
Blocks
When using the Modbus protocol, the RMS features a
block of addresses that can be configured by the user
to provide direct access to a list of 80 user configured
parameters. This allows the user easy access to this
customized list by reading from or writing to a con-
tiguous block of registers.
To acquire a better understanding of the tables
found in the back of this manual (See Appendix:
(
Modbus Programmable Memory Blocks
) please read
through the text below which defines the column
headers used.
Assembly Definition Addresses
- Fixed addresses used to define the parameter
that will be stored in the "Working Addresses",
which may also be referred to as a pointer. The
value stored in these addresses will reflect (point
to) the Modbus address of a parameter within the
controller.
Assembly Working Addresses
- Fixed addresses directly related to their associ-
ated "Assembly Definition Addresses" (e.g., As-
sembly Working Addresses 200 & 201 will as-
sume the parameter pointed to by Assembly Defi-
nition Addresses 40 & 41).
When the Modbus address of a target parameter is
stored in an "Assembly Definition Address" its cor-
responding working address will return that param-
eter’s actual value. If it’s a writable parameter, writ-
ing to its working register will change the param-
eter’s actual value.
As an example, Modbus register 410 contains the
Analog Input 1 Process Value (See Operations Page,
Analog Input Menu). If the value 410 is loaded into
Assembly Definition Address 91, the process value
sensed by analog input 1 will also be stored in Mod-
bus registers 250 and 251. Note that by default all
registers are set to Hardware ID.
The table (See Appendix:
) identified as "Assembly Definition
Addresses and Assembly Working Addresses" reflects
the assemblies and their associated addresses.