To poll discrete Atomic element(s) – Enter either the name of the Atomic Element (up to 40 characters), or enter '+' to look up the tag in the TagNames object.
Multiple Atomic elements (not part of a Structure) may be polled in a block by using a Continuation Poll.

To poll an Array – Tag name should be the name of the array, followed by the starting element in square brackets, such as: MyIntArray[3]
It is not normally recommended to use the '+' for Arrays, because it's very inefficient (each array element would be polled as a separate tag).
The starting element begins with 0, and the number of array elements to read should be specified in both the Read Count and Write Count (should be identical).
An Array of Atomic elements may be included as the first row of a Continuation Poll that includes other Atomic elements, but it cannot be used as a secondary row in such a poll.
An Array of Atomic elements may also be included as a row in a Continuation Poll of a Structure.
An Array of UDTs is not allowed.

To poll a Structure – Enter either the name of structure, or '+' to look up the Structure name in the TagNames object.
Continuation Poll rows in a Structure poll would include the names of elements in the structure or '+' to look up in the TagNames object, such as: Structure.Element_0

Tag names with dots may be interpreted by some MQTT hosts as a nested tag name hierarchy.
Tag names beginning with ten 'Z' characters are used in Allen Bradley PLCs to indicate hidden INT, SINT, or DINT values from which BIT fields are extracted.

For Atomic elements – Enter 1 for a single element or in the first row in a Continuation Poll. Enter 0 for the remaining Atomic elements in a Continuation Poll.
It is not permitted to use a Read/Write count greater than 1 for reading individual Atomic elements – instead, use Continuation Poll rows to read multiple Atomic elements, one per row.

For an Array – If polling a single Array, enter the number of array elements in both the Read Count and Write Count.
If polling an Array as part of a Structure, enter 0 for Read Count on a Continuation Poll row, and enter the number of array elements in the Write Count.
When polling an Array, no other individual Atomic elements can be part of its Continuation Poll.

For a Structure – If polling for a structure, use multiple rows in the Poll Table as a "Continuation Poll."
On the first row of a Continuation Poll, enter the Read Count as the size in bytes to request from the device (only a single Structure will be requested), and set the Write Count=0.
This first Poll Record will not store any data into the RTDB. The following records of the Continuation Poll must have Read Count=0 and Write Count specifying the number of elements to store sequentially into the RTDB.

For Atomic elements – The Write Count must be 1 when polling an individual element.

For an Array – Enter the number of array elements to store into the RTDB.

For a Structure – If polling for a structure, use multiple rows in the Poll Table as a "Continuation Poll."
On the first row of a Continuation Poll, enter 0 for the Write Count. The first Poll Record will not store any data into the RTDB.
The following records of the Continuation Poll should specify the number of Data Type elements to parse from the message and store sequentially into the RTDB beginning at the RTDB Destination Address. Typically, this will be 1 for an Atomic element or a count of elements for an Array.
If parsing data using the "Bit" type, the count must be the number of binary bits.
Include as many rows as needed to parse data from the poll message/structure, with Read Count=0 and Write Count set to parse the data type.

The Skip Reg and following parameters allow an advanced level of control over the poll messages sent to the device. This feature allows logic (ISaGRAF, POD) or other controls to modify the polling of individual commands to the device.

Enter an integer RTDB register address from this FieldUnit's RTDB which will be checked before issuing the poll record. The value in the register will be compared with the Skip Test and Skip Match properties. If the condition is satisfied, then the poll is handled according to the Skip Test setting.

Enter 0 to disable this feature, or when using one of the last three Skip Test options (below).

Select a condition to use for poll modification.
If a "Skip" condition is satisfied, then the Poll Record that would have otherwise been sent to the PLC is skipped, and the polling process moves immediately on to the next entry in the Master Channel's Scan Table.

Equal Constant Match – If the value in Skip Reg register is equal to the Skip Match value (constant), the poll is skipped.
If Grtr to Constant Match – If Skip Reg is greater than Skip Match (constant), the poll is skipped.
If Less to Constant Match – If Skip Reg is less than Skip Match (constant), the poll is skipped.
If Not Equal Constant Match – If the Skip Reg is not equal to the Skip Match (constant), the poll is skipped.

If Equal RtdbReg Match – If the value in Skip Reg register is equal to the value contained in the register pointed to by Skip Match, the poll is skipped.
If Grtr to RtdbReg Match – If the value in Skip Reg is greater than the value in the Skip Match register, the poll is skipped.
If Less to RtdbReg Match – If the value in Skip Reg is less than the value in the Skip Match register, the poll is skipped. 
If Not Equal RtdbReg Match – If the value in Skip Reg is not equal to the value in the Skip Match register, the poll is skipped.

NO SAVING Data with this Record – If using this Skip Test condition, the data elements in the Poll Table row are discarded and not stored in the RTDB. (Use 0 for Skip Reg and Skip Match.)
This option can be used when there are points in a structure that don't need to be stored, so the protocol can par

SAVE Integer to Hidden Buffer for Bit Extraction – When polling bit-packed integers, use this Skip Test condition to store the integer value into a hidden non-RTDB buffer temporarily for later extraction of bits. (Use 0 for Skip Test

EXTRACT BIT from Hidden Integer Buffer – Must follow the "Save Integer to Hidden Buffer for Bit Extraction row in the Poll Table." These can include "ZZZZZZZZZZ" entries to discard unneeded bits. Read=Write=1.

For "Constant Match" Skip Test selections, enter a constant value that will be used for the match criteria.

For "RtdbReg Match" Skip Test selections, enter the address of a register in this FieldUnit's RTDB which contains the value used for the match criteria.

Enter the address of a register in this FieldUnit's RTDB which will contain the length of the reply message (in bytes) from the PLC. This is only valid for the first row of a Continuation Poll.

The Save Reply feature allows the length of a successful poll to be saved to the RTDB, which could be the same as a Skip Reg register used to skip a poll on the next poll cycle once it has been received successfully. Set the Save Reply column to 0 if you don't wish to store the length of the reply message.