Chapter 5: Configuration Data / Ldt Memory - Ametek 953N Series Configuration Manual

Hex # Dec # Name
0C 12 Memory
Checksum
32 50 Part Number
33 51 Serial
Number
Memory Checksum (Attribute 12)
The list of memory checksum values for the position sensing variables
starting with RAM, NVRAM and Rapid Recall memory. The purpose of
this attribute is to quickly verify that the memory in RAM is the same that
is in NVRAM and that no parameters have been changed either through
an explicit message or through the webpage
Memory Checksum[0] = RAM
Memory Checksum[1] = NVRAM
Memory Checksum[2] = Rapid Recall Module
The Checksum values can be found in our Advanced parameter Object.
They can be retrieved by issuing an explicit message to class 100,
instance 1, attribute 12. The response will return 3 bytes of data. The first
byte is the RAM checksum, the second byte is the NVRAM checksum
and the third byte is the Rapid Recall checksum. The Explicit message
expects the Class and Attribute numbers to be in hexidecimal. Class 64
(hex), Instance 1, Attribute 0C (hex).
Part Number (Attribute 50)
This read only value will display the part number printed on the label of
the unit.
Serial Number (Attribute 51)
This read only value will display the Serial number printed on the label
of the unit.
4.4.3 Services
Service Code
Get_Attribute_Single 0Eh
Chapter 5 Configuration Data
Network LDT Memory
The Network LDT has three memory locations. These are called Factory,
User and RAM. Both the Factory and User memories are stored in
E2 memory. The Factory settings can be used to reset the LDT back
to factory defaults. All configuration settings can be made from our
Webpage or PLC and "Loaded" into RAM for testing purposes. Note:
These values will not be written to USER memory until the "Save"
command is issued. If they are not saved to USER they will be lost on
power down. On power-up the configuration settings in USER will be
transferred to RAM.
The LDT's RapidRecall™ Configuration Module is a smart device that
can store all user configurations. Once the LDT has been configured
these setting can be uploaded to the module by setting the DIP switches
to "606". Refer to Chapter 8 for all setting and features of the Rapidrecall™
Configuration Module, or a Save(02h) command can be sent to store these
values in the RapidRecall™ Module.
Phone: 248-435-0700 Toll Free: 800-635-0289 Fax: 248-435-8120 www.ametekfactoryautomation.com
Access Memory Type
R NV USINT[]
R NV SHORT_
STRING
R NV SHORT_
STRING
Class Support Instance Support
Yes Yes
One of the key benefits to uploading the configuration data to the
RapidRecall™ Configuration Module is that, if anything was to ever go
wrong with the LDT, the module could be removed from the original unit
and installed on the new unit. (In order to upload the configuration data
the DIP switches would need to be set to "616"). Or a Reset(2) command
can be sent to restore these values from the RapidRecall Module
The non-volatile attribute values in the Position Sensor and Advanced
Parameters objects are stored in the E2 (EEPROM) or flash memory.
The E2 memory is divided into 2 sections:
USER Configuration Store – The USER Configuration Store holds the
attribute values that have been set in the field by the customer.
FACTORY Configuration Store – The FACTORY Configuration Store
holds the attribute values that have been set during manufacturing.
These are the "factory default" values for the attributes.
The following diagram illustrates the flow of attribute values between the
application and E2.
Network Memory Block Diagram - Diagnostics
RAM
Working
Web
Attribute
Values
Load
Power-Up
Reset (2)
Save (2)
The current attribute values being used by the application are
determined as follows:
• On bootup
o All attribute values will be loaded from the USER Configuration
Store to RAM (Working Attribute Values).
• When a Set_Attribute service is issued
o The attribute will be set to the requested value and the new
value will be used immediately.
• When a Restore service is issued
o All attribute values for the associated object will be loaded
from the USER Configuration Store to RAM.
• When a Reset(0) service is issued
o All attribute values for the associated object will be loaded
from the USER Configuration Store to RAM.
• When a Reset(1) service is issued
o All attribute values for the associated object will be loaded from the
FACTORY Configuration Store to the USER Configuration store.
Attribute values are saved to the configuration stores as follows:
• When a Save(0) service is issued
o All attribute values for the associated object will be written to
the USER Configuration Store.
• When a Reset(1) service is issued
o All attribute values in the FACTORY Configuration Store will be
written to the USER Configuration Store.
Save (1)
Position
Bootup /
USER Factory
Restore /
Configuration Configuration
Reset (0)
Store Store
Reset
MFG
Save (0)
Reset (1)
E2 Memory
E2 Memory
Reset (2)
RapidRecall™
Configuration Module
606 & 616
From LDT RapidRecall™ Configuration Module
FACTORY AUTOMATION
Position
MFG
®
18