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This manual contains text, diagrams and explanations which will guide the reader in the correct installation
and operation of the FX-4AD special function block and should be read and understood before attempting
to install or use the unit.
Further information can be found in the FX PROGRAMMING MANUAL and FX SERIES HARDWARE
MANUAL.
1
The FX-4AD analog special function block has four input channels .The input channels receive
analog signals and convert them into a digital value.This is called an A/D conversion.The FX-4AD
has a maximum resolution of 12 bits.
The selection of voltage or current based input/output is by user wiring. Analog ranges of -10 to 10V
DC (resolution: 5mV), and/or 4 to 20mA, -20 to 20mA (resolution: 20µA) may be selected.
FX PC versions 2.0 or later (those with serial number 13OOOO or larger) are required as these
units have the TO/FROM applied instructions in their instruction set. Data transfer between the FX-
4AD and the FX base unit is by buffer memory exchange. There are 32 buffer memories (each of
16 bits) in the FX-4AD.
The FX-4AD occupies 8 points of I/O on the FX, FX
from either inputs or outputs. The FX-4AD draws 30mA from the 5V rail of the FX base unit or
powered extension unit.
SPECIAL FUNCTION BLOCK
USER'S GUIDE
INTRODUCTION
expansion bus. The 8 points can be allocated
2C
FX-4AD
JY992D52601E
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Summary of Contents for Mitsubishi MELSEC-F FX-4AD
- Page 1 FX-4AD SPECIAL FUNCTION BLOCK USER'S GUIDE JY992D52601E This manual contains text, diagrams and explanations which will guide the reader in the correct installation and operation of the FX-4AD special function block and should be read and understood before attempting to install or use the unit. Further information can be found in the FX PROGRAMMING MANUAL and FX SERIES HARDWARE MANUAL.
- Page 2 1.1 External dimensions weight : Approx 0.5kg (1.1 lbs) Dimensions:mm (inches) DC24V 35mm DC24V (1.38in.) M3.5 (0.14") DIN rail terminal mounting screws POWER slot READY (4.92") (5.51") OFFSET Mounting GAIN holes 5.5mm (0.27in.) Extension dia. cable and connector 10 (0.39") 63 (2.48") 73 (2.87") 95 (3.74")
- Page 3 INSTALLATION NOTES AND USAGE 3.1 General specification Item Specification General specifications(excluding withstand voltage) Same as those for the FX base unit 3.2 Power supply specification Item Specification Analog circuits 24V DC +/- 10%, 50mA(External power supply from base unit) Digital circuits 5V DC, 30mA(Internal power supply from base unit) 3.3 Performance specifications Analog inputs...
- Page 4 Analog inputs continued..Preset 0 (-10V to +10V) Preset 1 (+4mA to +20mA) Preset 2 (-20mA to +20mA) Digital Digital Digital Output Output +2047 Output +1750 +2000 +1600 +1000 -10.24V +1000 -10V -32mA -20mA +10V +20mA +32mA -1000 +10.235V -1600 -2000 -2048 Current...
- Page 5 3.4 Allocation of buffer memories (BFM) In buffer memory locations (BFMs) marked Contents with an "*" data can be written from the PC *# 0 Channel initialization Default = H0000 using the TO command. *# 1 Channel 1 Contains the number of samples (1 to 4096) to *# 2 Channel 2 be used for an averaged result.
- Page 6 (1) Channel Selection Channel initialization is made by a 4 character HEX number HOOOO in buffer memory BFM #0. The least significant character controls channel 1 and the 4 character controls channel 4. Setting of each character is as follows: O = 0: Preset range (-10V to +10V) O = 2: Preset range (-20mA to +20mA) O = 1: Preset range (+ 4mA to + 20 mA)
- Page 7 (4) Status information BFM #29 When any of b1 to b4 is ON. b 0:Error If any of b2 to b4 is ON,A/D conversion No error of all the channels is stopped Offset/Gain data in EEPROM is corrupted b 1:Offset/Gain error Offset/Gain data normal or adjustment error.
- Page 8 DEFINING GAIN AND OFFSET Gain Offset Digital 1000 Digital Offset value Gain value Analog Analog Gain determines the angle or slope of the calibration line, Offset is the 'Position' of the calibrated line, identified at a identified at a digital value of 1000. digital value of 0.
- Page 9 EXAMPLE PROGRAM 5.1 Basic program In the following example channels CH1 and CH2 are used as voltage inputs. The FX-4AD block is connected at the position of special function block No.0. Averaging is set at 4 and data registers D0 and D1 of the PC receive the averaged digital data.
- Page 10 5.2 Using gain and offset in a program The gain and offset of the FX-4AD can be adjusted using push-button switches on the input terminal of the PC. It can also be adjusted using software settings sent from the PC. Only the gain and offset values in the memory of the FX-4AD need be adjusted.
- Page 11 DIAGNOSTICS 6.1 Preliminary checks Check whether the input wiring and/or expansion cables are properly connected on FX-4AD analog special function block. Check that the FX system configuration rules have not been broken, i.e. the number of blocks does not exceed 8 and the total system I/O is equal or less than 256 I/O. Ensure that the correct operating range has been selected for the application.
- Page 12 If in doubt about the operation or use of the FX-4AD please consult the nearest Mitsubishi Electric distributor. Under no circumstances will Mitsubishi Electric be liable or responsible for any consequential damage that may arise as a result of the installation or use of this equipment.