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2MLF-AV8A
Honeywell 2MLF-AV8A User Manual
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2
.
Specificati
ons
2.3
.
Character
istics of
I/O conversion
26
Analog Input
Module
2MLF
-
A
V8A, AC8A
User's Guide
R
200
Honeywell
September 20
10
2.3
Characteristic
s of I/O
c
onversion
Characte
ristics of I/
O conversion
is a st
raight line
plott
ed bet
ween the Offs
et and Ga
in
values w
hen converti
ng analog sig
nal (voltage
or curre
nt input) f
rom PLC
’s external
device t
o digital val
ue. I/
O conve
rsion charact
er
istics of A/D conversion modules are as
follows.
25
27
Table of Contents
Default Chapter
9
Table of Contents
9
1 Introduction
15
Overview
15
Features
15
Terminology
17
Analog Value- a
17
Digital Value - D
17
Figure 1 - Analog Value
17
Figure 2 - Example of Transducer
17
Figure 3 - Digital Value
18
Figure 4 - Process in PLC
18
Characteristics of A/D Conversion
19
Figure 5 - Characteristics of A/D Conversion (Voltage Input)
19
Figure 6 - Characteristics of A/D Conversion (Current Input)
20
2 Specifications
21
Performance Specifications
21
Table 1 - Performance Specifications
21
Part Names and Functions
24
Figure 7 - Parts of 2MLF-AV8A and 2MLF-AC8A
24
Table 2 - LED Indications
25
Characteristics of I/O Conversion
26
I/O Characteristics of 2MLF-AV8A
27
I/O Characteristics of 2MLF-AC8A
33
Accuracy
38
Figure 8 - Accuracy
38
Functions
39
Functions of the Input Module
39
Table 3 - Performance Specifications
39
Sampling Process
40
Filter Process
40
Average Process
42
Function to Detect Input Signal Failure/Disconnect
44
3 Installation and Wiring
47
Installation
47
Installation Environment
47
Handling Precautions
48
Wiring
49
Precautions for Wiring
49
Wiring Examples
49
4 Operating Procedures and Monitoring
53
Operating Procedures
53
Figure 9 - Operating Procedure
53
Run Parameters Setting
54
Setting Items
54
Table 4 - I/O Parameter Setting Functions
54
Setting I/O Parameters
55
Special Module Monitoring
61
Register Special Module Variables
65
Registering Special Module Variables
65
Saving Variables
66
Program Example with Variable and Address
66
Figure 10 -Program Example with Variables and Addresses
67
5 Configuration and Function of Internal Memory
69
Internal Memory Configuration
69
Table 5 - I/O Area of A/D Converted Data
69
Setting Area of Run Parameters
71
Table 6 - Setting Area of Run Parameters
71
I/O Area of A/D Converted Data
73
Module Ready/Error (%Uxa.b.0, %Uxa.b.15; A: Base No., B: Slot No.)
73
Run Channel (%Uxa.b.16~23, A: Base No., B: Slot No.)
73
Digital Output Value (%Uwa.b.2 ~9, A: Base No., B: Slot No.)
73
Detect Input Signal Failure/Disconnect Flag (%Uxa.b.160~167 A: Base No., B: Slot No.)
74
Error Clear Request Flag (%Uxa.b.176, A: Base No., B: Slot No.)
75
Operation Parameters Settings Area
76
Address 0 - A/D Conversion Enable/Disable Status for each Channel
76
Address 1 - Input Voltage/Current Range
76
Address 2 - Output Data Format
79
Address 4-11 - Filter Constant
80
Address 12 - Average Process Enable/Disable
81
Address 13 - Average Process Method (Address Number 13)
82
Address 14-21 - Average Value
82
Error Code (Address Number 22)
83
Global Variable (Data Area)
85
How to Use Global Variable
85
Local Variable Registration
85
How to Use Local Variables
87
PUT/GET Function Block Use Area (Parameter Area)
90
PUT Instruction
91
GET Instruction
93
Example Using PUT/GET Instruction
94
Output Data Range Setting
97
6 Programming
107
Read/Write of Operation Parameter Settings Area
107
Read Operation Parameters Settings Area (GET, GETP Command)
107
Write Operation Parameters Settings Area (PUT, PUTP Command)
108
Configuring A/D Module Via Program Method
110
2Mlf-Av8A
110
2Mlf-Ac8A
111
Basic Program
113
2Mlf-Av8A
113
2Mlf-Ac8A
116
Application Program Examples
120
Program to Compare A/D Conversion Values
120
Program to Output Error Codes of Analog Input Module to BCD Display
124
Program Description
125
7 Troubleshooting
129
Error Codes
129
Table 7 - List of Error Codes
129
Troubleshooting
131
RUN LED Blinks
131
RUN LED Is off
132
CPU Module Cannot Read A/D Conversion Value
133
Mismatch between Analog Input Value and Digital Output Value
133
H/W Error of A/D Conversion Module
134
Status Check of A/D Conversion Module Using System Monitor Menu
134
8 Appendix
135
Appendix 1: Terminology
135
Appendix 2: External Dimensions
138
External Dimensions of 2MLF-AV8A/AC8A
138
4
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Honeywell 2MLF-AV8A Specifications
General
Brand
Honeywell
Model
2MLF-AV8A
Category
I/O Systems
Language
English
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