aci eRCM Express, Руководство пользователя

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mCore Firmware Ver 01.10 Ver 2019-Oct-29 Page 88 of 97
To make sure the PLC is waiting long enough to allow the eRCM Express to calculate all
performance data, do the following:
(Only applies when using Modbus protocol.)
1.
Connect a PC to the eRCM Express.
2. Run the eRCM Express Diagnostic Software on the PC.
3. Select the correct type of eRCM Express.
4. Specify which modeling file to use.
5. Select the option to run performance timings.
a. Specify option for data block sizes: Minimum, Normal, Everything
i. Minimum: Typical if only using the Quick List for Writes and Reads
ii. Normal: Typical if limiting data based on number of load steps, number of
stages, number of throws, and number of cylinders.
iii. Everything: Reads back all data registers. If using a gateway (ProSoft Card
or Red Lion) then many users may program those to read back all data.
6. Wait until performance timings are complete.
a. Average Time to Send Write Data to eRCM Express
b. Average Time to Calculate Results within eRCM Express
c. Average Time to Retrieve Read Data back from eRCM Express
7. In the PLC, after writing the data to eRCM Express, wait “ Average Time to Calculate
Results
” plus 50 ms before reading data back from the eRCM Express.
a. For most units, this will likely be around 100-150 ms.
b. For more complex units, this may be in the 150-350 ms range.
8. If there are multiple models in the eRCM Express, then each one should be checked
separately. The PLC code might then use a common wait time for all models (if they all
have similar times), or set the wait time uniquely per model (if their times tend to differ
a lot).