Allen-Bradley ProcessLogix 1756-IA16, Reference Manual, Page: 111 / 120

Publication 1757-RM810A-EN-P - May 2002
Functional Blocks 3-71
REQTEXTARRAY (Request Text Array)
RSPFLAGARRAY (Response Flag Array)
Description Provides storage for up to 64 ASCII characters that are accessible through the corresponding string configuration
parameter (STR [n]). Where “n” is the number of the text string.
Function
•
Provides predefined text (STR [0..7]) strings to other blocks.
•
Number of string values (NSTRING) is user configurable.
•
The length of the text strings (STRLEN) is user configurable to 64 characters
•
Supports a maximum size of 64 two-byte characters.
Inputs/Outputs Up to 8 output strings (STR [0..7]), depending on the number of string (NSTRING) and length of string (STRLEN) values
configured.
Associated
Block REQFLAGARRAY and .REQNUMARRAY.
Parameters COMMAND
DHCHANNEL
DHDESTLINK
DHFL
DHNODE DHSRCLINK
DONEFL
ERRCODE
ERRFL
ERRINFO FILENUM
LASTRESPTM
NSTRING
ORDERINCM
PATH READYFL
SENDFL
STR [0..7]
STRLEN
Description The Flag Array Block is used to read or write an array of up to 512 BOOLEAN values.
Function The Response Array function blocks can be used to respond to requests from third-party devices using the PCCC or CIP
protocols. These function blocks will be loaded to and run in the CPM, and will have the ability to have data values
read and written by third-party devices.
Inputs/Outputs The Response Array Blocks are configured with the address used by the remote device to reference its data and the
data size. The configuration information cannot be modified at run-time. If changes must be made to the configuration
of a Response Array Block, these changes must be made in the Project Database and the block must be reloaded to
the controller for the changes to take effect. These blocks are not internally triggered, data reads and writes occur as
a result of external communications requests. They are also not Alarming Blocks and so cannot generate Alarms by
themselves. No fragmentation or re-assembly is done either in the blocks themselves.
Associated
Block .RSPNUMARRAY and .RSPTEXTARRAY.
Parameters FILENUM
NFLAG
ORDERINCM PVFL [0..511]
PVVALSTS [0..511]
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