snap ethernet-based i/o units protocols and programming guide
snap ethernet-based i/o units protocols and programming guide
snap ethernet-based i/o units protocols and programming guide
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APPENDIX A: SNAP ETHERNET-BASED BRAIN MEMORY MAP<br />
Starting Address Length Type Description<br />
FFFF F210 0050 4 UI PID 0: Configuration: Algorithm choice.<br />
0 = PID disabled<br />
1 = Velocity algorithm<br />
2 = ISA algorithm<br />
3 = Parallel algorithm<br />
4 = Interacting algorithm<br />
FFFF F210 0054 4 UI PID 0: Configuration: Manual mode. 1 = Yes; 0 = No<br />
FFFF F210 0058 4 UI PID 0: Configuration flags: 1 = Enable square root of Input. 2 =<br />
Force output when Input is out of range. Set range in addresses<br />
F210 0028 <strong>and</strong> F210 002C.<br />
4 = Switch to manual mode when input goes out of range.<br />
FFFF F210 005C 4 UI PID 0: Configuration bits ON. Used to control individual<br />
Configuration flag bits. Write a 1 to turn the bit on.<br />
FFFF F210 0060 4 UI PID 0: Configuration bits OFF. Used to control individual<br />
Configuration flag bits. Write a 1 to clear the bit.<br />
FFFF F210 0064 4 UI PID 0: Current value of Input (newer than last scanned value in<br />
F210 0000). Read from F210 0044.<br />
FFFF F210 0068 4 UI PID 0: Current value of Setpoint (newer than last scanned value in<br />
F210 0004). Read from F210 0048.<br />
FFFF F210 006C 14 -- Reserved<br />
FFFF F210 0080 4 F PID 1: Last scanned value of Input or process variable (PV)<br />
FFFF F210 0084 4 F PID 1: Last scanned value of Setpoint<br />
FFFF F210 0088 4 F PID 1: Current value of feed forward<br />
FFFF F210 008C 4 F PID 1: Current value of Output<br />
FFFF F210 0090 4 F PID 1: Tuning: P (Gain) value. Should be positive for cooling,<br />
negative for heating.<br />
FFFF F210 0094 4 F PID 1: Tuning: I (Integral) value, in <strong>units</strong> of one per second. Increase<br />
value to increase contribution.<br />
FFFF F210 0098 4 F PID 1: Tuning: D (Derivative) value, in seconds. Increase value to<br />
increase contribution.<br />
FFFF F210 009C 4 F PID 1: Tuning: Feed forward gain<br />
FFFF F210 00A0 4 F PID 1: Configuration: Maximum output change allowed. Zero<br />
disables this feature.<br />
FFFF F210 00A4 4 F PID 1: Configuration: Minimum output change allowed. Zero<br />
disables this feature.<br />
FFFF F210 00A8 4 F PID 1: Scaling: Input low range<br />
FFFF F210 00AC 4 F PID 1: Scaling: Input high range<br />
FFFF F210 00B0 4 F PID 1: Scaling: Output lower clamp<br />
FFFF F210 00B4 4 F PID 1: Scaling: Output upper clamp<br />
144 SNAP Ethernet-Based I/O Units Protocols <strong>and</strong> Programming Guide