Rockwell Automation 1771-PD PID MODULE (+DU) - Manual (Page 201)

Application Example 2, Periodic Block
Transfer
Appendix C
CĆ17
Specific Example
Once the program has been written, specific parameters of the dynamic
block and loop block can be entered into the respective data table files.
This can be done using the data monitor display mode of the industrial
terminal. In ladder diagram (program) mode, place the cursor on the
file-to-file move instruction in rung 1 and press the (DISPLAY)(1) keys
on the industrial terminal keyboard. The hexadecimal display of the
dynamic block and loop blocks will appear on the screen. Enter the
selected standard and expanded feature values.
The features and values that have been selected for this example program
problem are tabulated below according to the control word in which the
features are programmed.
Master Control Word (W01)
Bits 17, 16 = 1 Both identifier bits must be 1.
Bit 15 = 0 Two loops are selected.
Bit 14 = 1 Expanded features are used.
Bit 13 = 0 Calibration bit must be 0.
Bit 12 = 0 Format is BCD.
Bit 11 = 0 Setpoint format is BCD.
Bit 10 = 0 Soft fault is programmed for manual reset.
Bit 10 is controlled in rung 2.
Bit 07 = 1 Diagnostics are reported in word W60.
Bit 06 Load bit is controlled by user program.
Bits 05, 04 = 0 Verify bits must be 0.
Bit 03 Enter bit is controlled by user program.
Bit 02 = 0 Set output bit is not used.
Bit 01 = 0 Analog output is set to programmed value if
loss of PVinput 1 occurs. Bit 01 is in
rung controlled 27.
Bit 00 = 0 Manual request bit is not used.
Loop 1 Control Word A (W18)
Bit 17 = 0 Block identifier must be 0.
Bit 16 = 1 Block identifier must be 1.
Bit 15 = 0 The source of the process variable input
is the analog input.
Bit 14 = 0 Square root is not used.
Bit 13 = 0 Error is positive (SP-PV).
Bit 12 = 0 Error limiting is not used.