Warnings, Cautions, and Notes
as Used in this Publication
Warning notices are used in this publication to emphasize that hazardous voltages,
currents, temperatures, or other conditions that could cause personal injury exist in this
equipment or may be associated with its use.
In situations where inattention could cause either personal injury or damage to equipment,
a Warning notice is used.
Caution notices are used where equipment might be damaged if care is not taken.
Notes merely call attention to information that is especially significant to understanding and
operating the equipment.
GFL-002
Warning
Caution
Note
This document is based on information available at the time of its publication. While efforts
have been made to be accurate, the information contained herein does not purport to cover all
details or variations in hardware or software, nor to provide for every possible contingency in
connection with installation, operation, or maintenance. Features may be described herein which
are not present in all hardware and software systems. GE Fanuc Automation assumes no
obligation of notice to holders of this document with respect to changes subsequently made.
GE Fanuc Automation makes no representation or warranty, expressed, implied, or statutory
with respect to, and assumes no responsibility for the accuracy, completeness, sufficiency, or
usefulness of the information contained herein. No warranties of merchantability or fitness for
purpose shall apply.
The following are trademarks of GE Fanuc Automation North America, Inc.
Alarm MasterField ControlModelmasterSeries One
CIMPLICITYGEnetPowerMotionSeries Six
CIMPLICITY ControlGeniusProLoopSeries Three
CIMPLICITY PowerTRACGenius PowerTRACPROMACROVuMaster
CIMPLICITY 90–ADSHelpmateSeries FiveWorkmaster
CIMSTARLogicmasterSeries 90
The Series 90 Micro PLCs have been tested and found to meet or exceed the requirements of FCC Rule, Part 15,
Subpart J. The Federal Communications Commission (FCC) requires the following note to be published according to
FCC guidelines.
Note
This equipment generates, uses, and can radiate radio frequency energy and if not installed in
It has been tested and found to comply with the limits for a Class A digital device pursuant to Part
15 of the FCC Rules, which are designed to provide reasonable protection against harmful
residential area is likely to cause harmful interference, in which case the user will be required to
correct the interference at his own expense.
The following note is required to be published by the Canadian Department of Communications.
Note
apparatus set out in the radio interference regulations of the Canadian Department of
Communications.
GFK-1065Fiii
This page was intentionally left blank for pagination purposes . . .
replace with a BLANK SHEET
iv
The following markings are required to appear in the Series 90 Micro PLC User’s for Class I Div 2
1.
IS SUITABLE FOR USE IN CLASS I, DIVISION 2, GROUPS A,B,C,D
OR NON-HAZARDOUS LOCATIONS ONLY.
Preface
2.WARNING - EXPLOSION HAZARD - SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I, DIVISION 2:
and
ADVERTISSEMENT - RISQUE D’EXPLOSION - LA
SUBSTITUTION DE COMPOSANTS PEUT RENDRE
CE MATERIEL INACCEPTABLE POUR LES EMPLACEMENTS DE CLASSE I, DIVISION 2.
3.WARNING - EXPLOSION HAZARD - DO NOT
DISCONNECT EQUIPMENT UNLESS POWER HAS
BEEN SWITCHED OFF OR THE AREA IS KNOWN
TO BE NON-HAZARDOUS.
ADVERTISSEMENT - RISQUE D’EXPLOSION AVANT DE DECONNECTER L‘EQUIPEMENT,
COUPER LE COURANT OU S‘ASSURER QUE
L‘EMPLACEMENT EST DESIGNE NON DANGEREUX.
v
replace with a BLANK SHEET
vi
Content of This Manual
This manual provides information necessary to enable you to integrate a Series 90 Micro
Programmable Logic Controller (PLC) into a wide variety of control applications. This manual
contains descriptions of hardware components, installation procedures, system operation
information, and maintenance information for the Series 90 Micro PLC.
Revisions to This Manual
This manual revision (GFK-1065E) incorporates the following changes:
Preface
• A new 14-point Micro PLC, IC693UDD104, is now available. Technical information
pertaining to this unit has been added where appropriate.
• Additional corrections have been made as needed.
Content of This Manual
Chapter 1. Quick Start. Brief procedures for getting the Micro PLC up and running. Includes
“Frequently Asked Questions” and “Programming Examples.”
Chapter 2. Introduction. An overview of the Micro PLC functional and physical characteristics.
Describes compatibility with other Series 90 PLCs and lists model specifications.
Chapter 3. Installation. Procedures for installing the Micro PLC and preparing the system for use.
Included in this chapter are instructions for unpacking, inspecting, and installing the Micro PLC.
Instructions are also provided for connecting cables to programming devices.
Chapter 4. Field Wiring. Power and I/O specifications, and wiring information for the Micro PLC.
Chapter 5. Configuration. Configuration and programming using the Logicmaster 90 Micro
software or the Hand-Held Programmer.
Chapter 6. High Speed Counters. Features, operation, and configuration of the High Speed
Counter function.
Chapter 7. Analog I/O. Features, operation, and configuration of the Analog I/O function, a
feature of the 23-point Micro PLC.
Chapter 8. System Operation. System operation of the Micro PLC. Includes a discussion of the
PLC system sweep sequences, the power-up and power-down sequences, clocks and timers, security
through password assignment, and the I/O system.
GFK-1065Fvii
Preface
Chapter 9. Diagnostics. A guide to troubleshooting the Micro PLC system. Section 1 describes
how to use the self-diagnostic LED blink codes. Section 2 describes how the Micro PLC handles
system faults.
Appendix A. Instruction Timing. Tables showing the memory size and execution time required
for each function.
Appendix B. Reference Types. Listing of user references and references for fault reporting. Also
contains tables listing memory locations that are reserved for I/O functions.
Appendix C. PLC/Software Cross Reference. A comparative listing of the instructions and
function blocks supported by the Series 90 Micro PLC and the Series 90-20 PLC.
Appendix D. Serial Port and Cables. Description of the serial port, converter, and cables used to
connect Series 90 PLCs for Series 90 Protocol (SNP).
Appendix E. Converters. Detailed description of the RS-422/RS-485 to RS-232 Converter for the
Series 90 PLCs. Describes the Miniconverter Kit for and the Isolated Repeater/Converter with
Series 90 PLCs.
Appendix F. Cable Data Sheets. Data sheets describing each of the Series 90 PLC cable types that
are commonly used with the Micro PLC.
Appendix G. Sample Application for PWM and Pulse Outputs. An example of the use of analog
I/O through a signal conditioning unit.
Appendix H. Case Histories. Brief summaries of applications that use the Micro PLC.
Logicmaster™ 90 Series 90-30/20/Micro Programming Software User’s Manual (GFK-0466)
Series 90™-30/20/Micro Programmable Controllers Reference Manual (GFK-0467)
Workmaster® II PLC Programming Unit Guide to Operation (GFK-0401)
Workmaster Programmable Control Information Center Guide to Operation (GEK-25373)
Hand-Held Programmer, Series 90™-30/20/Micro Programmable Controllers User’s Manual
(GFK-0402)
Series 90™-30 Programmable Controller Installation Manual (GFK-0356)
Series 90™-70 Programmable Controller Installation Manual (GFK-0262)
Series 90™ PLC Serial Communications User’s Manual (GFK-0582)
Series 90™ Micro Field Processor User’s Manual (GFK-0711)
Important Product Information, Micro PLC (GFK-1094)
Preface
Important Product Information, Micro Expansion Unit (GFK-1474)
Data Sheet, 14-Point Micro PLCs (GFK-1087)
Data Sheet, 28-Point Micro PLCs (GFK-1222)
Data Sheet, 23-Point Micro PLC (GFK-1459)
Data Sheet, Micro Expansion Unit (GFK-1460)
At GE Fanuc Automation, we strive to produce quality technical documentation. After you have
used this manual, please take a few moments to complete and return the Reader's Comment Card
located on the next page.
This chapter provides an overview of the steps required to get your Micro PLC set up and running.
The Series 90 Micro PLC product line offers models with different capabilities and special features
to meet the needs of a wide range of applications. For this reason, you will need to refer to other
chapters in this manual for details pertaining to the specific Micro PLC that you have. For
summaries of Micro PLC features and specifications for each model, refer to Chapter 2.
No. of I/O PointsI/O ConfigurationPower SupplyCatalog Numbers
148 DC inputs, 6 relay outputs
148 DC inputs, 6 relay outputs
148 AC inputs, 6 AC outputs100 to 240 VACIC693UAA003
148 DC inputs, 6 DC outputs
148 DC inputs, 6 relay outputs (expansion unit)
2313 DC inputs, 1 DC output, 9 relay outputs,
2 ana log in, 1 anal og out
2816 DC inputs, 1 DC output, 11 relay outputs100 to 240 VACIC693UDR005
2816 AC inputs, 12 AC outputs100 to 240 VACIC693UAA007
2816 DC inputs, 1 DC output, 11 relay outputs24 VDCIC693UDR010
100 to 240 VAC
12 to 24 VDC
12 to 24 VDC
100 to 240 VAC
100 to 240 VACIC693UAL006
• Programming device and appropriate cables: Workmaster® II or CIMSTAR I industrial
computer, an I BM® AT, PS/2® or other MS-DOS comp at i ble Personal Computer (with 386 or
higher microprocessor and 2 MB memory), or a Hand-Held Programmer and cable.
•RS-422 to RS-232 Interface. Logicmaster 90 software can use a Work Station Interface (WSI)
board, an RS-422 port, or a standard RS-232 interface with an RS-422 to RS-232 converter.
The WSI board is in stalled in th e Workmaster II compu ter at th e fact ory.
•Tools for mounting the Micro PLC and connectin g field wiring ca bles.To run Logicmaster 90-30/20/Micro software, the programmer (computer) will need:
• At least 4MB of free disk space.
• At least 520KB (532,480 bytes) of available DOS application memory for the WSI version; at
least 564KB (577,536 bytes) of available DOS application memory, or 520 KB and 42 KB of
available High Memory Area, Upper Memory Block, or Expanded Memory. For details, see
The following procedure outlines the steps required to put your Micro PLC into operation.
Step 1.Unpack the Micro PLC
First, carefully inspect all shipping containers for damage. Unpack the shipping container and
verify the contents. Record all serial numbers. For details, see “Unpacking” in Chapter 3.
Step 2.Install the Micro PLC
Mount the Micro PLC on a vertical surface: a wall or panel using screws or on a 35mm DIN rail.
The Micro PLC requires a minimum clearance of 1.99 inches (50mm) on each side for cooling.
For details, see “Installation Requirements” and “Installation” in Chapter 3.
Step 3.Connect Ground and Power Wiring
•For safe operation of your Micro PLC, the installation must meet the requirements of
“Grounding Procedures” in Chapter 3.
•For power connections, refer to the wiring diagram for the Micro PLC model that you have.
(See “Field Wiring Installation” in Chapter 4.)
Step 4. Power-up Test
Warning
Ensure that the protective cover is installed over terminals on the terminal
board when power is applied to the unit. The cover protects against
accidental shock hazard which could cause severe or fatal injury to
personnel.
Apply the required power to the system. The Micro PLC should perform a self-diagnostic test. The
OK indicator will blink during power-up diagnostics. When self-diagnostics have been successfully
completed, the OK indicator will remain lighted. For details, refer to “Powerup Self-test” in
Chapter 3.
Step 5. Connect a Programmer to the PLC
Connect a programming device to the RS-422 serial port (Port 1) on the Micro PLC. (Port 2 on 28
and 23-point Micro PLCs does not support configuration and programming.) For cabling diagrams,
refer t o “ Connecti ng a Progra mming Devi ce ” in Chapter 3.
If Logicmaster 90 software is not installed on your programmer, install it according to the
procedures in the
GFK-0466.
1-2Series 90™ Micro PLC User's Manual – June 1998GFK-1065F
Step 6.Configure the Micro PLC
The Logicmaster 90 configuration function is used to select Micro PLC operating parameters to
meet the requir ements of your system.
.
A
Start up your computer in DOS mode.
.
B
At the DOS prompt, type CD LM90 and press th e E
.
C
Type LM90 and press E
NTER
.
NTER
key.
1
D. When th e main menu for th e Log icmaster 90 software app ears, pr es s S
PLCs will appear.
E. From the list, select the type of Micro PLC that you have and press EF. Pr ess F2. The Software Configuration menu will appear.For deta ils on con figur ation, r e fer to Chapters 5, 6, and 7. When you have fini shed c onfi guring the
Micro PLC, press E
Step 7.Enter a Ladder Program
A.In the Logicmaster 90 main menu, press F2. The Programming Software menu will appear.
.
B
Press F1, Program Display Edit. An empty program folder will appear. For details on using the
programming software, refer to the
User’s Manual
Series 90™ Micro Programmable Logic Controller Self-Teach Manual
Turn off power to the Micro PLC before connecting field wiring.
Step 8.Connect Field Wiring
Refer to “Field Wiring Installation” in Chapter 4 for general wiring information and wiring
diagrams for each Micro PLC model.
to return to the main me nu .
SC
Logicmaster 90-30/20/Micro Programming Software
, GFK-0466. A sample program for the Micro PLC is provided in the
Warning
+ F1. A list of
HIFT
.
NTER
, GFK-1104.
GFK-1065FChapter 1 Quick Start1-3
1
Frequently Asked Questions
1.What causes a “No Communications” message when I toggle to MONITOR or ONLINE?Following are a few possible causes:
•Insufficient conventional memory (at least 545Kbytes) in your personal computer to load the
Logicmaster 90 communications driver.
Make sure the config.sys file in your computer is properly configured. For details on configuring
your config.sys file, refer to “Software Installation” in the
30/20/Micro Programming Software User’s Manual
your personal computer help line or GE Fanuc PLC Technical Support at 1-800-GEFANUC.
•Configuration mismatch between Logicmaster 90 in your computer and the PLC configuration.Make sure that the computer and the PLC are using the same baud rate and parity. From the main
menu in Logicmaster 90, press F2 to enter the configuration software. To check the computer
settings, press F7, Pr ogra mmer M ode and Setup, and th en F4, PLC Communicati on s Ser ia l Port
Setup. To check th e PLC settin gs, press F1, I/O Configuration. The PLC baud rate and parity will
be displayed in the Software Configuration Screen.
Logicmaster™ 90 Series 90™-
, GFK-0466. For additional assistance, call
•Broken cable between your computer and PLC or broken or missing RS-232/RS-422
converter.
For information on installing the converter, refer to Appendix E in this manual.
2.How do you set up the High Speed Counters (HSCs)?Using the Logicmaster 90 configuration software or a Hand-Held Programmer (HHP), enable each
HSC that you want to use. If you want the HSC to drive an output, you must enable its output in the
software configuration and set its Enable Output bit in your program or in the data tables. For
example, if HSC 1 is configured with its output enabled and its Output Enable bit, %Q505 is set, it
will control Q1. (HSC 1 will continually report to the CPU memory location %AI06.) A sample
rung that sets the Output Enable bit for HSC 1 is shown below.
For more information, refer to “High Speed Counter/CPU Interface” in Chapter 6 of this manual.Simple (A-type) counters and A-Quad-B (B-type) HSCs count
continuously
by default, resetting
themselves automatically when a high or low limit is reached. A-type HSCs can also be configured
for
one-shot
counting, in which the HSC counts to one past the limit and then stops.
In one-shot mode, the HSC can be reset by the program using a Communications Request
(COMM_REQ) functi on to write a z ero to th e Accumul at or. The HSC can also be reset by the
Preload input . If th e count er’ s Pr el oad / Strobe parameter is set to PRELOAD (default ) , the
configured preload value will be loaded to the Accumulator when the Preload/Strobe signal goes
1-4Series 90™ Micro PLC User's Manual – June 1998GFK-1065F
active. For exam ple, if PRELOAD is configured and the defau l t Prel oa d Val u e of 0 is used, an
input on I2 will reset the Accumulator for HSC 1.
For wiring information, refer to the diagrams in “High Speed Counter Inputs” and the wiring
diagr am s provided in “Genera l Wiring Pr oced u res” in Chapter 4.
Warning
When the Micro PLC goes from RUN to STOP mode, the HSCs will
continue to operate. Al so, t he HSCs will remain i n run mode through a
power cycle. Therefore, if an HSC is running when power is lost, it will run
when power is restored.
3.How do I program the Micro PLC?You can use a Hand Held Programmer (IC693PRG300) or Logicmaster 90 software
(IC640HWP300, includes a 2-meter programming cable) loaded into a DOS-based personal
computer. The personal computer must have at least a 386 processor and at least 2 megabytes of
RAM.
1
For a new-user programming lesson, refer to Appendix A of the
GFK-0466. Chapter 4 of the
Manual,
PLC.
4.What should I do when I get a “Password disabled” or “insufficient privilege” message?There are two possible causes for these messages:
•Passwor d i s set to DISABLE in th e Software Con fig ura tion screen for the Micro PLC.The default config ur at ion for password is ENABLE. When chan g ed to DISABLE an d stored t o th e
Micr o PLC , the setting is perm anent. If the confi g uration i s ch anged back to E NA BLE and stored ,
the “password disabled” error message will be generated and the store will not be allowed. You can
either change th e configuration back to DISABLE, or use an HHP to eras e th e program and
configuration, thereby restoring the default configuration.
•Insufficient privilege has been set in the Software Configuration and stored to the PLC.
The OEM password cannot be overwritten. To remove the OEM password, you must use the HHP
to clear the PLC memory.
If a password has been set from the level 4 menu and then forgotten, you can override it. This
procedure is documented in Chapter 5 in the
program disks are required.)
5.What does it mean when OK LED is blinking or the Run LED is not lighted?
GFK-0467 provides descriptions and examples of programming commands for the Micro
Series 90™-30/20/Micro Programmable Controllers Reference
Software User’s Manual
Software User’s Manual
, GFK-0466. (The original
,
Each time power is applied, the CPU performs a self check for several seconds. The OK LED
blinks during the self-test and then changes to a steady on state.
If the Run LED does not light when you go to run mode, the cause could be invalid configuration
or a fata l er ror in the C P U fau lt table.
GFK-1065FChapter 1 Quick Start1-5
1
Programming Examples
Test Rung
In the following test rung, an input on I1 will turn on output Q1.
%I1 %Q1
|—————————| |—————————————————( )—|
On-Delay Timer
In the following LD, the set coil, M0001, turns on the timer, which counts to 5 seconds (00050 x
0.10s) and then activates %M0002. %M0002 turns on the output, %Q0001, activates %M0003 to
reset the timer, and resets M0001.
+%M0002 %M0001
+——] [——————————————————————————————————(R)——|
|
[ END OF PROGRAM LOGIC ]
1-6Series 90™ Micro PLC User's Manual – June 1998GFK-1065F
Chapter
2
Introduction
Series 90 Micro PLCs offer an a rray of useful features, including:
• Compatibility with Logicmaster 90-30/20/Micro programming software
• Support for the 90-30 Hand-Held Programmer (HHP)
• An alarm processor function
• Password protection to limit access to PLC content s
• A built-in High Speed Counter (HSC) function that can be configured as four type A counters
or as one type B counter and one type A counter (DC in/relay out Micro PLCs only)
•Two potentiometers that pr ovide selectable analog inputs to %AI16 and %AI17 (with
configurable filtering)
• Configurable software filtering of discrete inputs
• Series 90 (SNP) a nd SNP Ext ended (SNPX), a nd RTU slave communication protocols
pulse catch input
•A
microseconds in width
function, selectable on up to four inputs, that detects pulses at least 100
• Pulse train and Pulse Width Modulation (PWM) outputs (Micro PLCs with DC output only)
• Compatibility with 14-point expansion unit (23 and 28-point Micro PLCs)
• Pager Enunciation function that can be configured to send a specified byte string from Serial
Port 2 (23 and 28-point Micro PLCs)
•Two analog inputs and one anal og output (23-point Micro PLC)
GFK-1065F2-1
2
The Micro PLC hardware consists of a single module that includes CPU, I/O, and power supply
functions (Figure 2-1). The compact, lightweight unit is designed for 35mm DIN rail or panel
mounting.
a45452
24 VDC OUT
100-240VAC
LH
Typical 14-Point Mi cro PLC
24 VDC OUT
100-240VAC
PWR
OK
RUN
INPUT
12345678
OUTPUT
~
Q1 C OM 1 VC Q2 Q3 Q4
I1 I2 I3 I4 COM1
PWR
OK
RUN
INPUT
1
OUTPUT
~
Q1 COM1 Q2 COM2 Q3 Q4
COM2I5 I6 I7 I 8I1 I2 I3 I4 CO M1
COM2LH
Q5
INPUT
COM2I5 I6 I7 I8
Se rie s 9 0 Mi cro
2345678
PROGRAMMAB LE CONTROLLER
INPUT
OUTPUT
OUTPUT
COM3Q6
Q6
Q5
INPUT
910111213141516
789101112
OUTPUT
COM4Q7
Q8 COM5 Q9 COM6 Q10 Q11 CO M7
COM3
Series 90 Micro
PROGRAMMABLE CONTRO LLER
a45499
COM4I15 I16 COM4I11 I12 CO M3I14I9 I10I13COM3
COM7
Q12
Typical 28-Point Mi cro PLC
Figure 2-1. Series 90 Micro Programmable Logic Controll ers
2-2Series 90™ Micro PLC User's Manual – June 1998GFK-1065F
Compatibility
• Logicmaster 90-30/20/Micro software(IC641SWP301, 304, 306, 307), release 8.01 or later
• Series 90-30 firmware release 5.0 and later
• Series 90-30 Hand-Held Programmer (IC693PRG300)
• Series 90 Protocol (SNP and SNPX) a nd RTU Slave protocol
• Series 90-20 PLCs (Micro PLCs with relay output – IC693UDR005/010 and UAL006 – only)
Table 2-1. Configuration/Programming Software Versions for Partial Compatibility
2
Store to
Logicmaster 90
Software Version
8.00 or laterNoYesYesYes
5.01 or laterYesYesYesNo
6.01 or laterYesYesYesNo
Table 2-2. Micro to Micro Compatibility
ComponentRel. 3 reads from Memcard
ProgramYesYes
RegistersYesNo
ConfigurationYesNo
Micro Rel. 2
or Earlier
Written by a Rel. 2 Micro
Store to
Micro Rel. 3
or Later
Load from
Micro Rel. 2
or Earlier
Rel. 2 reads from Memcard
Written by a Rel. 3 Micro
Load from
Micro Rel. 3
or Later
Instructions and Function Blocks
The Series 90 Micro PLC supports most 90-30 instr uction functions and function blocks.
Detailed descriptions and examples of the use of these instructions can be found in the
See Appendix A for a list of instructions supported by the Series 90 Micro PLC.
GFK-1065FChapter 2 Introduction2-3
2
Functional Description
The Micro PLC contains a CPU circuit board, an I/O board, and a Power Supply board. Figure 2-2
provides an overview of Micro PLC inputs and outputs and of the functions performed by each
circuit board.
CPU Board
The CPU contains and executes the user program and communicates with the programmer (HHP
or computer runn in g Logicmaster 90-30/90-20/Micro software). The primary capabilities of the
Micro PLC CPU h ardware are listed in Table 2-3
Table 2-3. CPU Capabilities
512K x 8 sectored flash memory for operating
system and nonvolatile user program storage (3K
words of user flash memory)
32 Kbyte RAM backed by super cap (provides data
retention for 3–4 days with the power off at 25°C)
Maximum User Program - 3K wordsMaximum User Program – 6K words
Registers - 256 wordsRegisters – 2K words
Typica l Sca n Rate: 1. 8 ms/K of l ogic (Boolea n
contacts)
An RS-422 serial port that supports SNP, SNPX and
RTU S lave prot ocols
14-Point Micro PLCs23 and 28-Point Micro PLCs
H8/3003 microprocessor running at 9.84Mhz
Powerup reset circuit
Interrupt for power fail warning (2.0 ms)
Internal Coils - 1024
Four configurable 5Khz HSCs
256K x 16 sectored flash memory for operating
system and nonvolatile user program storage (6K
words of user flash memory)
64 Kbyte RAM backed by lithium battery
Real time clock backed up by lithium battery
Typica l Sca n Rate: 1. 0 ms/K of l ogic (Boolea n
contacts)
Two RS-422 serial ports: Port 1 supports SNP/SNPX
slave protocols; Port 2 supports SNP/SNPX Slave
and Mas ter pr otocols and RTU S lave protocol. (P ort
2 does not support the HHP.)
Ability to support up to four expansion units
2-4Series 90™ Micro PLC User's Manual – June 1998GFK-1065F
Hand-held
Program mer
SNP
Port
ClockReset
Microprocessor
Flash
Memory
control
RAM
2
a45683
Parallel
Expansion
Port
24 V DC
In put Powe r
Pots.
INPU T
LEDs
OUTPUT
IN P U T
OUTPUT
2
Inp uts
Outputs
PSOK
RUN
I/O C irc uits
Figure 2-2. Micro PLC Functional Block D i agram
OK
PWR
RUN
OK
24 VD C for O utp uts
24 V D C for Inp uts
CPU Board
LEDs
PSOK
5 VDC
In p u t P o w e r
5.14 VD C
Power Supply Boar dI/O Board
GFK-1065FChapter 2 Introduction2-5
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