Read/Write/Verify Data With A Programmer Present; Including All The Necessary Information; Matching Oem Protection; Adjusting The Configuration Timeouts - GE VersaMax PLC User Manual

15.1 Read/Write/Verify Data with a Programmer Present

The EZ Program Store Device
For public disclosure
With a programmer present, the PLC CPU can read, write, or verify a program,
configuration and tables in the EZ Program Store device. When reading or verifying data,
it is possible to select hardware configuration, logic, and/or reference tables data.
However, when writing data to the EZ Program Store device, all three data types must be
written. If the hardware configuration includes Ethernet Global Data and/or a file of
Advanced User Parameters for Ethernet communications, they will also be included.
The programmer must be using version 1.5 or later of the VersaPro programming
software.
Warning

15.1.1 Including All the Necessary Information

When the EZ Program Store device updates a PLC, it writes over existing configuration,
program files and data in the target PLC. Therefore, it is important to be sure that the
information placed on the EZ Program Store device is complete for proper operation of
the PLC system. For example, if the EZ Program Store device contains an application
program, but instead of a customized hardware configuration it contains the default PLC
configuration, the update will overwrite any existing configuration data in a PLC being
updated. If that happens, the modules in the PLC system will then use their default
configuration, which may cause unexpected operation.

15.1.2 Matching OEM Protection

If the PLC(s) that will be updated by the EZ Program Store device are protected by an
OEM key password, be sure the same OEM key password is present in the configuration
stored to the EZ Program Store device, otherwise no update will be possible. If the PLC
(s) being updated had no OEM key password assigned, the EZ Program Store device must
also not have an OEM key password. The device does not use other system passwords.
(See chapter 7, CPU Operation, for information about passwords and the OEM key).

15.1.3 Adjusting the Configuration Timeouts

Reading and writing large programs, hardware configurations, and reference tables to or
from the EZ Program Store device may take 30 seconds or more to complete. To avoid
possible disconnect errors or read/write errors, adjust the request timeouts in the
configuration to 30 - 63 seconds (30,000 - 63,000mS).
Do not use the pushbutton on the EZ Program Store
device to invoke an update while: 1. Loading
program logic, configuration data, and/or reference
tables from the PLC to the programmer. 2. Verifying
program logic, configuration data, and/or reference
tables in the PLC with the programmer.Doing so
may corrupt the data being loaded or verified and
produce unexpected results. You should power-cycle
the PLC to restore normal operation.
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