Programmable Controller FP0-A04V PLC FP0A04V FPO-AO4V

Panasonic FP0-A04V | FP0 Series 4-Channel Analog Output Module — ±10V / 0–20mA, 12-Bit Resolution, DIN Rail, 24VDC, Compatible with FP-X Series via Adapter

Overview

The Panasonic FP0-A04V is the 4-channel analog output expansion unit for the FP0 PLC series — the module that takes four digital output words from the PLC program and converts them into proportional analog voltages or currents for commanding drives, valves, and other analog-controlled actuators.

Four output channels in a single compact module, hanging directly off the FP0 control unit's expansion connector without any intervening cables, made the FP0-A04V the standard choice for machine applications requiring multi-channel analog output from a compact PLC.

The FP0 platform's expansion architecture — where units snap together directly on the same DIN rail without requiring any wiring between them for the backplane communication — is what makes the FP0-A04V straightforward to deploy.

There is no communications cable to run, no address to set, and no separate power connection required for the module: the 24V DC supply and the expansion bus data connection come through the direct side connector between the control unit and the expansion units.

The analog output module simply appears in the control unit's register map at the addresses determined by its physical position in the expansion chain.

The 12-bit resolution of the FP0-A04V divides the ±10V voltage output range into 4000 steps — steps of 5mV per count.

For commanding a variable-speed drive with a 0–10V or ±10V analog reference input, this resolution means the speed setpoint can be set to within 0.025% of full scale, which is more than adequate for standard industrial speed control applications.

The current output mode (0–20mA) uses the same 4000-step digital range, with each step representing 5µA — sufficient for commanding proportional valve drivers, transducer transmitters, and other 4–20mA or 0–20mA input devices.

Key Specifications

Output Channel Configuration — Voltage vs Current

Each of the four output channels on the FP0-A04V can be individually configured for voltage or current output by wiring the appropriate terminal — a hardware-level selection rather than a software parameter. The module provides separate terminal blocks for voltage (V) and current (I) output on each channel; the signal appears on whichever terminal is connected and the other remains unused.

For voltage output (−10V to +10V), the actuator connects between the V terminal and the COM terminal.

For current output (0–20mA), the load connects between the I terminal and the COM terminal, and both V and I terminals are connected together at the module side to switch the module's output stage to current-source mode. 

The terminal assignment procedure is documented in the FP0 series operating manual, and the wiring must be consistent with the output mode intended — incorrect wiring will not damage the module but will produce no useful output on the wrongly connected terminal.

This per-channel flexibility means the FP0-A04V can serve a mixed installation: channel 1 commanding a ±10V-input servo drive, channel 2 driving a 0–20mA proportional valve, channels 3 and 4 providing voltage setpoints to two inverters — all from the same four-channel module without requiring separate voltage-output and current-output modules for different channel types.

PLC Program Integration — Register Mapping and Conversion

The PLC program writes 16-bit signed integers to the registers corresponding to each output channel.

The FP0 system maps the FP0-A04V's channels to output word registers (WY) at addresses determined by the module's position in the expansion chain.

The relationship between the digital value written by the program and the resulting analog output is linear:

For ±10V output: a digital value of −2000 produces −10V; a value of +2000 produces +10V; 0 produces 0V.

The 4000-step range from −2000 to +2000 spans the full ±10V output. For 0–20mA output: a value of 0 produces 0mA; a value of 4000 produces 20mA.

This direct integer-to-analog mapping allows straightforward PLC program logic: the program calculates the desired output value in engineering units (speed setpoint in rpm, flow setpoint in litres per minute, position reference in mm), scales it to the digital range, and writes it to the channel's output register.

The conversion happens every scan cycle, so the analog output tracks the PLC program's calculated value with no additional configuration required.

FP-X Series Compatibility via Expansion Adapter

Despite the FP0-A04V's product line designation, it can also be used with the FP-X series PLCs through the AFPX-EFP0 expansion adapter (also known as the FP-X Expansion FP0 Adapter).

This adapter connects to the FP-X control unit's expansion bus and provides an FP0-compatible expansion connector, allowing up to three FP0 expansion units — including analog modules, thermocouple input modules, and I/O link units from the FP0 range — to attach as if they were connected to an FP0 control unit.

For machine designers already using FP-X series PLCs who need analog output channels that the FP-X's own expansion units may not provide, or for installations upgrading from FP0 to FP-X while retaining existing FP0 peripheral units, this compatibility path extends the useful service life of the FP0-A04V hardware beyond the FP0 control unit itself.

Legacy Status and Successor Product

The FP0-A04V is listed as Obsolete in Panasonic's product catalog.

The current production replacement is the FP0R-DA4 (AFP0RDA4), which provides the same 4-channel analog output function in 12-bit compatibility mode but adds a 14-bit high-resolution operating mode (1/16000 steps) for applications requiring greater output precision.

The FP0R-DA4 is backward-compatible with FP0-A04V installations — it can operate in 12-bit FP0-A04V compatibility mode by setting its mode switch accordingly, and it uses the same terminal wiring arrangement. For users maintaining existing FP0-A04V installations, the FP0R-DA4 is the direct drop-in replacement.

FAQ

Q1: The FP0-A04V has 4 output channels. Can all four channels output simultaneously at different values?

Yes. All four channels convert and output simultaneously each PLC scan cycle.

The PLC program writes independent values to each channel's output register in a single scan, and the FP0-A04V updates all four analog output values at the same time.

There is no multiplexing or time-sharing between channels — each channel has its own dedicated D/A converter circuit.

Q2: What is the settling time after the output register is updated — how quickly does the analog output reach the new value?

The FP0-A04V's settling time — the time from a new digital value being written to the channel register to the analog output reaching the new level within the specified accuracy — is in the range of a few milliseconds for a full-scale step change.

The actual settling time depends on the load capacitance (for voltage output) or load resistance (for current output).

For most industrial actuator applications — inverters, servo drives, proportional valves — the settling time is fast relative to the PLC scan cycle, so the analog output effectively tracks the last written register value each scan.

Q3: Is external power required for the FP0-A04V, and if so, what type?

Yes. Like other FP0 analog units, the FP0-A04V requires an external 24V DC power supply connected to its power input terminals — this is separate from the 5V bus power received through the expansion connector from the control unit.

The 5V bus power (supplied by the control unit) handles the internal logic; the external 24V DC powers the analog output circuits and drives the output voltage and current levels. The power cable (AFP0581) is the standard accessory for this connection.

The operating voltage range is 21.6 to 26.4V DC, which covers standard 24V industrial power supplies with ±10% tolerance.

Q4: Can the FP0-A04V's output be clamped to prevent it from exceeding a specific range — for example, limiting output to 0–10V rather than ±10V?

The hardware output range of the FP0-A04V is fixed at ±10V (voltage) or 0–20mA (current).

There is no hardware-level clamping to a narrower range. Limiting the output range is done in the PLC program: the program calculates the output value, applies its own upper and lower limits (for example, limiting the written value to 0–2000 for 0–10V output), and writes the clamped value to the register.

This software clamping is flexible and can be changed by modifying the program without hardware changes.

Q5: What is the wire break or short-circuit protection status of the analog output channels?

The FP0-A04V's voltage output channels are not short-circuit protected in the conventional sense — connecting the V output terminal directly to the COM terminal will cause the output amplifier to try to drive zero volts across zero impedance, which may damage the output stage over time.

The current output channels have inherent current limiting by their design (they are constant-current sources), so current output is more tolerant of load variation. 

For reliable long-term operation, ensure that the load connected to each voltage output channel presents an appropriate impedance as specified in the FP0 series module manual.