User Guide - Eurotherm Ltda

More documents

Recommendations

Info

nanodac RECORDER/CONTROLLER: USER GUIDEB2.5.2 Setpoint LimitsThe setpoint generator provides limits for each of the setpoint sources as well as an overall set of limits forthe loop. These are summarised in figure 2.5.2, below.MaxDispRangeHigh+SpanSPHigh LimitSP TrimHighRemoteSP1SP2TargetSPWorkingSPLoopAlmsetpointsSP TrimSPLow LimitSP TrimLowMinDispRangeLow-SpanFigure 2.5.2 Setpoint Limits‘Range High’ and ‘Range Low’ provide the range information for the control loop. They are used in controlcalculations to generate proportional bands. Span = Range High – Range Low.B2.5.3 Setpoint Rate LimitThis symmetrical rate limiter allows the rate of change of setpoint to be controlled, preventing step changesin the setpoint. The limit is applied to the working setpoint which includes setpoint trim.Rate limiting is enabled using the ‘Rate’ parameter. If this is set to ‘0’ then any change made to the setpointwill be effective immediately. If it is set to any other value, then a change in the setpoint will be have ratelimiting applied at the value set, in units per minute. Rate limit applies to SP1, SP2 and Remote SP.When rate limit is active ‘Rate Done’ displays ‘No’. When the setpoint has been reached the value changesto ‘Yes’.When ‘Rate’ is set to a value (other than ‘Off’) an additional parameter ‘SP Rate Disable’ is displayed whichallows the setpoint rate limit to be turned off and on without the need to adjust the ‘Rate’ parameter betweenOff and a working value.If the PV is in sensor break, the rate limit is suspended and the working setpoint takes the value of 0. Onsensor break being released the working setpoint goes from 0 to the selected setpoint value at the rate limit.Appendix BPage 318HA030554Issue 7 Nov 12
nanodac RECORDER/CONTROLLER: USER GUIDEB2.5.4 Setpoint TrackingThe setpoint used by the controller may be derived from a number of sources. For example:-1. Local setpoints SP1 and SP2. These may be selected through the front panel using the parameter ‘SPSelect’, through digital communications or by configuring a digital input which selects either SP1 orSP2. This might be used, for example, to switch between normal running conditions and standby conditions.If Rate Limit is switched off the new setpoint value is adopted immediately when the switch ischanged.2. A programmer generating a setpoint which varies over time. When the programmer is running, the‘Track SP’ and ‘Track PV’ parameters update continuously so that the programmer can perform its ownservo. This is sometimes referred to as ‘Program Tracking’.3. From a Remote analogue source. The source could be an external analogue input into an analogueinput module wired to the ‘Alt SP’ parameter or a <strong>User</strong> Value wired to the ‘Alt SP’ parameter. Theremote setpoint is used when the parameter ‘Alt SP Enable’ is set to ‘Yes’.Setpoint tracking (sometimes referred to as Remote Tracking) ensures that the Local setpoint adopts the Remotesetpoint value when switching from Local to Remote to maintain bumpless transfer from Remote to Local.Bumpless transfer does not take place when changing from Local to Remote.Note: If Rate Limit is applied, the setpoint will change at the set rate, when changing from Local toRemote.B2.5.5 Manual TrackingWhen the controller is operating in manual mode the currently selected SP (SP1 or SP2) tracks the PV. Whenthe controller resumes automatic control there will be no step change in the resolved SP. Manual trackingdoes not apply to the remote setpoint or programmer setpoint.HA030554Issue 7 Nov 12Appendix BPage 319
Page 1 and 2:
nanodacUser Guidenanodac recorder/c
Page 3:
Declaration of ConformityManufactur
Page 6 and 7:
nanodac RECORDER/CONTROLLER: USER G
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274 and 275:
Page 276 and 277:
Page 278 and 279:
Page 280 and 281: nanodac RECORDER/CONTROLLER: USER G
Page 348 and 349: NANODAC RECORDER/CONTROLLER: USER G
Page 380 and 381:
Page 382 and 383:
Page 384 and 385:
Page 386 and 387:
Page 388 and 389:
Page 390 and 391:
Page 392:
show all

User Guide - Eurotherm Ltda

Create successful ePaper yourself

Delete template?

Save as template?