Mitsubishi AL2 Series User Manual

α2 Simple Application Controllers
Function Blocks 6
6 - 50
6.21 Retentive Alternate Block
This block is equivalent to the Alternate Function block described in section 6.4 but includes a
the retention function. When the retention function is ON, the Retentive Alternation (RAL)
output will act as a latched output and remember the ON/OFF settings in the case of a power
failure. Every time the input pin receives a signal the ALT Output changes its ON/OFF status.
The Output alternates turning ON and OFF.
A Clear input signal over-rides the input signal and turns the Output OFF.
Table 6.21: Retentive Alternate Function Block
Retentive Alternation time chart
Function Set Item Description
I Input pin for retentive alternate function block
C
Clear input pin resets the state of the output regardless of the input
given
FB Retentive alternation of the output status
Output
The output is affected in the following operation:
1) Reverse the ON/OFF state of the output whenever the input sig-
nal’s ON/OFF operation to the input pin is turned ON (ON to OFF or
OFF to ON)
2) The clear selection resets the output regardless of the input given.
3) Remember Output Signal after a Power Cut
000
LA
OI
C
R
Input pin
OFF ON
Clear pin
Stop mode
(Power OFF)
Run mode
OFF ON
Keep ON/OFF
state of Output pin
Run mode/
Stop mode
(Power OFF)
Output pin

Mitsubishi AL2 Series Specifications

General

Model	AL2 Series
Digital Inputs	Yes
Digital Outputs	Yes
Type	PLC
Manufacturer	Mitsubishi
Input Voltage	100 to 240 VAC or 24 VDC (depending on model)
Output Voltage	24V DC
Number of Inputs	8 to 64 (depending on model)
Number of Outputs	6 to 64 (depending on model)
Programming Language	Ladder Diagram
Communication Ports	RS-232, RS-485, Ethernet (depending on model)
Operating Temperature	0 to +55°C
Storage Temperature	-20°C to 70°C
Humidity	10% to 90% (non-condensing)
Weight	Varies depending on the model