Texas Instruments 7MT200

Transfers of data to individual 7MT I/O modules may be controlled by setting the corresponding command bit(s) to the desired value. Transfers of information occur in read and write blocks. Each read and write block transfers all data in one scan. The maximum block size is 512 words for both blocks, although timing estimates are calculated based on 480 words total. If your program is limited to reads or writes only, set both the size and address of the other type of block to zero (0).

All 7MT modules require at least one control block to operate. Other modules, especially those that are configured through software rather than jumper selection, may require as many as three control blocks. 7MT base and its associated control blocks with the configuration table V-memory beginning address at V2000. Note that for every configuration table defined, the minimum configuration size is 196 words. The configuration table beginning address and the next 195 consecutive addresses must only be used for valid configuration table information.

All transfers of data from the PLC to 7MT I/O can be started or stopped simultaneously by changing the value in WY5 ( a value of 0 halts operation and the integer value of the beginning address of the configuration table starts/continues operation).

See also: Siemens 7MT200