Library manual M238 system functions | 2 MB - BERGER - POSITEC

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Glossary PWM reflex output retained data RTC SFC Structured Text system variable Pulse Width Modulation is used for regulation processes (e.g. actuators for temperature control) where a pulse signal is modulated in its length. For these kind of signals, transistor outputs are used. R In a counting mode, the high speed counter’s current value is measured against its configured thresholds to determine the state of these dedicated outputs. A retained data value is used in the next power-on or warm start. The value is retained even after an uncontrolled shutdown of the controller or a normal switch-off of the controller. The real-time clock option keeps the time for a limited amount of time even when the controller is not powered. S A program written in the Sequential Function Chart language can be used for processes that can be split into steps. SFC is composed of steps with associated actions, transitions with associated logic condition, and directed links between steps and transitions. (The SFC standard is defined in IEC 848. It is IEC 61131-3 compliant.) A program written in the structured text (ST) language includes complex statements and nested instructions (such as iteration loops, conditional executions, or functions). ST is compliant with IEC 61131-3. A system variable structure provides controller data and diagnostic information and allows sending commands to the controller. 86 EIO0000000364 04/2012
U unlocated variable An unlocated variable does not have an address. (See located variable.) Glossary EIO0000000364 04/2012 87
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EIO0000000364.06 Modicon M238 Logic
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Table of Contents Safety Informatio
Page 5 and 6:
Important Information NOTICE Safety
Page 7 and 8:
At a Glance Document Scope Validity
Page 9 and 10:
Overview Modicon M238 Logic Control
Page 11 and 12:
Understanding System Variables Intr
Page 13 and 14:
Using System Variables Introduction
Page 15 and 16:
1.2 PLC_R and PLC_W Structures Over
Page 17 and 18:
%MW Var Name Type Comment 60024 i_w
Page 19 and 20:
1.3 SERIAL_R and SERIAL_W Structure
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SERIAL_W[0..1]: Serial Line Read /
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Overview Modicon M238 Logic Control
Page 25 and 26:
GetBatteryLevel: Returns Remaining
Page 27 and 28:
GetEventsNumber: Returns the Number
Page 29 and 30:
Example M238 System Functions This
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GetLastStopCause: Returns the Cause
Page 33 and 34:
GetLocalIOStatus: Returns the Embed
Page 35 and 36: GetPlcFault: Returns Detected Error
Page 37 and 38: M238 System Functions I/O Expansion
Page 39 and 40: Example M238 System Functions To ob
Page 41 and 42: M238 System Functions GetShortCutSt
Page 43 and 44: IsFirstMastCycle: Indicates if Cycl
Page 45 and 46: M238 System Functions IsFirstMastWa
Page 47 and 48: InhibitBatLowLed: Disables or Re-en
Page 49 and 50: SetRTCDrift: Adjust the Real Time C
Page 51 and 52: Overview Modicon M238 Logic Control
Page 53 and 54: PLC_R_STATUS: Controller Status Cod
Page 55 and 56: PLC_R_BOOT_PROJECT_STATUS: Boot Pro
Page 57 and 58: M238 PLC System Library Data Types
Page 59 and 60: 3.2 System Functions Data Types Ove
Page 67 and 68: HOUR: SetRTCDrift Function Hour Par
Page 69 and 70: Modicon M238 Logic Controller EIO00
Page 71 and 72: Overview Modicon M238 Logic Control
Page 73 and 74: How to Use a Function or a Function
Page 75 and 76: Function and Function Block Represe
Page 77 and 78: How to Use a Function or a Function
Page 79 and 80: Function and Function Block Represe
Page 81 and 82: 1-phase counter 2-phase counter BOO
Page 83 and 84: expansion bus E Glossary The expans
Page 85: Modbus NEMA PLC PLI POU PTO M The M
Page 89 and 90: Modicon M238 Logic Controller Index
Page 91 and 92: System Variable PLC_R, 16 PLC_W, 18
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Library manual M238 system functions | 2 MB - BERGER - POSITEC

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