Page 427 - Programmable Logic Controllers, Fifth Edition - Mobile version

Channels per module, analog I/O modules, 34
348–350f
Circuits. see also specific types ladder logic addition to main routine, 348–350, Convert-to-BCD (TOD) instruction, 51, 53f, 235, 243, 243f
Conveyor warning signal circuit, 139f
electrical interlocking, 115–116, 115–116f ladder logic program, 346, 346f COP. See File copy (COP) instruction
seal-in, 114–115, 114–115f latch and unlatch instructions, 352–353, 352–353f Cost, 2–3
Circulating shift register function, 265 one-shot instruction, 353–354, 354–355f Count-down (CTD) counter, 168, 168f
Clear (CLR) instruction, 243 program scan, 345–346, 345f CLX system, 371–372f
Closed architecture, 4 tag-based addressing, 347–348, 347f Count-down (CD) enable bit, 160
Closed-loop control system, 226–229, 309–310, 309f comparison instructions, 376–378, 377–379f Counter file, 75
block diagram of, 227, 228f configuration, 334–335, 335f Counter function, timer function and, 174–177
Closed-loop servo motor system, 114, 114f counters, 368–372, 368f Counter number, 161
CLR (Clear), 208 combined with timer functions, 372, 372f Counters, 82, 156–178
CMOS-RAM chips, 38, 38f count-down (CTD) counter, 371–372f accumulated value, 158, 158f
Coaxial cable, 317, 317f count-up (CTU) counter, 369–370f, 369–371 application, 157f
Codes. see Number systems and codes overview, 368–369 block-formatted, 158, 158f
Coil-formatted counter instruction FBD programming, 388–392, 388–393f cascading counters, 170–172, 171f
up-counter, 157–158, 157f, 158f function block diagram (FBD), 384–387, 384–387f CLX system, 368–372, 368f
Coil-formatted timer instruction, 134–135, 135f add-On instructions, 384 combined with timer functions, 372, 372f
Cold junction compensating (CJC) thermistor, 27 Assume Data Available indicator marker, 387, 388f count-down (CTD) counter, 371–372f
Collision detection access control scheme., 320 BAND (Boolean AND) function block, count-up (CTU) counter, 369–370f, 369–371
Combination control process, 121, 121f 384–385, 385f overview, 368–369
Combination I/O modules, 21–22, 21f data latching, 387, 387f coil-formatted, 157–158, 157f, 158f
Commissioning, 288 feedback loop, 387, 387f combining with timer functions, 174–177, 175f
Common Industrial Protocol (CIP), 323–324, 325 function blocks, 384 decrement, 158
Common-mode rejection, analog I/O modules, 34–35 references, 385 down-counter, 166–169, 167f
Communication module, 4f, 18, 32, 33f signal flow and execution, 386–387, 386f electronic, 157, 157f
Communications capability, 3, 4f wire connectors, 385–386, 386f high-speed, 177–178, 178f
Communications protocol, 300 wires and pins, 385, 386f increment, 158
Commutative law, 65 math, comparison, and move instructions, combining, incremental encoder-counter applications, 173–174, 174f
CompactLogix system, 333 380–382, 380–382f input conditions, 158
Compare menu tab, 217, 217f math instructions, 374–376, 374–376f instructions, 157–158
Comparison instruction, CLX system, 376–378, 377–379f, memory layout, 334, 334f mechanical, 157, 157f
380–382, 380–382f move instructions, 379, 380f selection toolbar, 161f
Compute instruction, 235–236, 235f programs, 336–337, 337f up-counter, 159–166, 159f
Compute/Math menu tab, 235, 235f project, 335–336, 335–336f Counting, high-speed, 4f
Computer memory, 48, 49f routines, 337, 337f Count-up (CTU) counter
Computers, vs. PLCs, 11–12, 11–12f structures, 340–341, 340–341f CLX system, 369–370f, 369–371
Configuration, CLX system, 334–335, 335f tag-based addressing format, 19, 20f Count-up (CU) enable bit, 160
Consecutive group, 208 tags, 337–340, 338–340f CPU section, processor module, 35
Constant voltage (CV) transformer, 287 creating, 341, 341f Cross reference function, 289, 290, 290f
Contact histogram function, 290–291 monitoring and editing, 342, 342f Current sensing, 27
Contact instruction, 85 tasks, 336, 336f CV. See Control variable (CV)
Contactors, 100, 101f timers, 358–366
Contacts cascading, 365, 366f D
control relays, 100 off-delay timer (TOF), 362–363, 362–363f
instantaneous, 132 on-delay timer (TON), 359–362, 359–362f DAC (digital-to-analog converter), 29, 94
normally closed (NC), 99, 100f predefined structure, 358–359, 358f Daisy-chain topology, 326, 327f
normally open (NO), 99, 100f reciprocating, 365 Data communications, 316–328. see also Network
Container-filling process, 310f retentive on-delay timer (RTO), 364–365, communications
Continuous process, 306, 306f 364–365f ControlNet, 325, 325f
Continuous-scan test mode, 93 Control management PLC application, 13, 13f Data Highway, 322, 322f
Continuous tasks, 336 ControlNet, 325, 325f defined, 316
Continuous test mode, 289 Control panel DeviceNet, 322–325, 323–324f
Control, FAL instruction, 212 PLC-based, 2, 3f EtherNet/IP, 325, 326f
Control circuit, 100 relay-based, 2, 3f Fieldbus, 326, 327f
Control devices, output, 112–113f, 112–114 Control process HART, 328, 328f
Control file, 75 automatic, 121, 121f industrial networks, functionality levels, 318, 318f
Controllers, 308–310. see also specific types combination, 121, 121f LAN, 317–318, 317f
deadband, 311, 311f sequential, 121, 121f Modbus, 326, 326f
proportional, 311–315, 311f flow diagram, 121–122, 121f parallel data transmission, 321, 321f
Controller tag, 338 I/O connection diagram, 122, 122f point-to-point serial communications link, 317, 317f
ControlLogix 5000 ladder logic program for, 122, 123f PROFIBUS-DP, 326–327, 327f
BSL instruction, 271–272, 272f relay schematic for, 122, 122f SERCOS, 327, 328f
BSR instruction, 271 Control relays (CR) serial, 322, 322f
counter instructions, 162, 163f coils, 100 serial transmission, 321–322, 321f
FIFO instruction pair, 275–276, 276f contacts, 100 transmission media, 317, 317f
immediate output instruction, 194, 194f electromagnetic, 99–100, 99–100f Data comparison, 208, 216–221. See also Data
memory structure, 75 internal, 89 manipulation
Modulo (MOD) instruction, 242, 242f operation, 99, 99f EQU instruction, 217, 217f
pass/fail inspection program, 271–272, 272f pilot lights control operation, 99–100, 100f GEQ instruction, 217, 218, 218f
platform, 48 symbol, 99, 100f GRT instruction, 217–218, 217f
program, 220, 220f Control systems. see also Process control; Process(es) LEQ instruction, 217, 218, 218f
timer instruction, 136–137, 136f actuators, 308 LES instruction, 217, 218, 218f
ControlLogix Sequencer Output (SQO) instruction, closed-loop, 309, 309f LIM instruction, 217, 218–220, 219f, 220f
258–259, 259f, 260f controllers, 308–310 MEQ instruction, 217, 220–221, 220f, 221
array, 259 distributive, 307, 308f NEQ instruction, 217, 217f
control, 259 HMI, 308 use, 216–217
destination, 259 motion control, 315–316 vs. data transfer, 216
length, 259 on/off control, 310–311, 310–311f Data files, 75–78, 77–78f
mask, 259 PID control, 311–315 Data File screens, RSLogix 500 software, 92, 92f
position, 259 sensors, 308 Data flow, scan process, 79, 79f
ControlLogix (CLX) system, 334–393 signal conditioning, 308 Data Highway, 322, 322f
array, 342–343, 343f structure, 308–310 Data latching, FBD, 387, 387f
bit-level programming, 345–355 Control variable (CV), 229 Data manipulation
internal relay instructions, 350–352, 351–352f Convert from BCD (FRD) instruction, 235, 243, 243f closed-loop control, 226–229
408 Index

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