Function Mode of the CWRITE_REG Block

Although a large number of CWRITE_REG function blocks can be programmed, only four write operations may be active at the same time. In this case it is irrelevant whether they are the result of this function block or others (e.g. MBP_MSTR, MSTR, WRITE_REG). All function blocks use one data transaction path and require multiple cycles to complete a job.

If several CWRITE_REG function blocks are used within an application, they must at least differ in the values of their NO_REG or REG_WRIT parameters.

NOTE: A TCP/IP communication between a Quantum PLC (NOE 211 00) and a Momentum PLC (all TCP/IP CPUs and all TCP/IP I/O modules) is only possible, when only one read or write job is carried out in every cycle. If several jobs are sent per PLC cycle, the communication stops without generating an error message in the status register of the function block.

All routing information is contained in the WordArr5 data structure of the ADDRFLD input. The type function block assigned to this input is defined by the network used.

Please use:

NOTE: The WordArr5 data structure can also be used with constants.
NOTE: This function block puts a heavy load on the network; therefore the network load must be carefully monitored. If the network load is too high, the program logic should be reorganized, in order to work with the WRITE_REG function block, a variation of this function block that does not operate in a continuous mode, but under command control.