Write Register Start The Write Register Start parameter specifies the start of the Write Data area in module memory. Data in this area will be transferred in from the processor. Note: Total user database memory space is limited to the first 5000 registers of module memory, addresses 0 through 4999. Therefore, the practical limit for this parameter is 4999 minus the value entered for Write Register Count, so that the Write Data Area does not try to extend above address 4999. Read Data and Write Data Areas must be configured to occupy separate address ranges in module memory and should not be allowed to overlap.
Write Register Count
The Write Register Count parameter specifies the size of the Write Data area of module memory and the number of registers to transfer from the processor to this memory area, up to a maximum value of 5000 words. Note: Total Read Register Count and Write Register Count cannot exceed 5000 total registers. Read Data and Write Data Areas must be configured to occupy separate address ranges in module memory and should not be allowed to overlap.
Backplane Fail Count
This parameter specifies the number of consecutive backplane transfer failures that can occur before communications should be halted. Error/Status Block Pointer -1 to 4939 Starting register location in virtual Modbus database for the error/status table. If a value of -1 is entered, the error/status data will not be placed in the database. All other valid values determine the starting location of the data. This data area includes the module version information and all server error/status data. Refer to Status Data Definition for more information.
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