Special Functions - IDEC FC4A-C10R2 User Manual

1: G I
ENERAL NFORMATION
HMI Module (all CPU modules)
An optional HMI module can be installed on any all-in-one type CPU module, and also on the HMI base module mounted
next to any slim type CPU module. The HMI module makes it possible to manipulate the RAM data in the CPU module
without using the Online menu options in
HMI module functions include:
• Displaying timer/counter current values and changing timer/counter preset values
• Displaying and changing data register values
• Setting and resetting bit operand statuses, such as inputs, outputs, internal relays, and shift register bits
• Displaying and clearing error data
• Starting and stopping the PLC
• Displaying and changing calendar/clock data (only when using the clock cartridge)
• Confirming changed timer/counter preset values
Clock Cartridge (all CPU modules)
An optional clock cartridge can be installed on the CPU module to store real time calendar/clock data for use with
advanced instructions to perform time-scheduled control.
Memory Cartridge (all CPU modules)
A user program can be stored on an optional memory cartridge using
another CPU module to replace user programs without the need for connecting to a computer. The original user program in
the CPU module is restored after removing the memory cartridge. The user program on the memory cartridge can also be
downloaded to the CPU module. The download option is selected using
Analog I/O Modules (all CPU modules except the all-in-one 10- and 16-I/O types)
Analog I/O modules are available in 3-I/O types, 2-input type, and 1-output type. The input channel can accept either volt-
age (0 to 10V DC) and current (4 to 20 mA) signals or thermocouple (types K, J, and T) and resistance thermometer (Pt
100) signals. The output channel generates voltage (0 to 10V DC) and current (4 to 20 mA) signals.
AS-Interface Master Module (slim type 20-I/O relay output and 40-I/O types)
Four upgraded slim type CPU modules (FC4A-D20RK1, FC4A-D20RS1, FC4A-D40K3, and FC4A-D40S3) with system
program ver. 201 and higher can use the AS-Interface master module, and have additional internal relays and data registers
to communicate with slaves, such as actuators and sensors, through the AS-Interface bus. For details about AS-Interface
module and AS-Interface communication, see page 2-57 and chapter 28.

Special Functions

The features various special functions packed in the small housing as described below. For details about these
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functions, see the following chapters.
Stop and Reset Inputs
Any input terminal on the CPU module can be designated as a stop or reset input to control the
RUN/STOP Selection at Startup when "Keep" Data is Broken
When data to be kept such as "keep" designated counter values are broken while the CPU is powered down, the user can
select whether the CPU starts to run or not to prevent undesirable operation at the next startup.
"Keep" or "Clear" Designation of CPU Data
Internal relays, shift register bits, counter current values, and data register values can be designated to be kept or cleared
when the CPU is powered down. All or a specified range of these operands can be designated as keep or clear types.
High-speed Counter
The has four built-in high-speed counters to make it possible to count up to 65,535 (FFFFh) high-speed pulses
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which cannot be counted by the normal user program processing. One high-speed counter (all-in-one type CPU modules)
or two high-speed counters (slim type CPU modules) can be used as either two-phase or single-phase high-speed counters
at a maximum count input frequency of 20 kHz. Three or two others are single-phase high-speed counters with a maxi-
mum counting frequency of 5 kHz. The high-speed counters can be used for simple positioning control and simple motor
control.
1-2
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. The memory cartridge can be installed on
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operation.
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