Mitsubishi Electric MELSEC-L Series LD40PD01, User Manual

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APPENDICES
Appendix 2 Details of Buffer Memory Areas
Hardware logic area (Un\G1000 to Un\G1099)
The monitor items and setting items of the hardware logic can be assigned to buffer memory addresses.
There are two types of areas for the buffer memory areas: High speed area and low speed area. For each area, the
addresses are assigned as follows.
These items are also read or written when an interrupt signal is sent to the CPU module.
■
Assignable monitor items and setting items
The following items can be assigned to these areas.
*1 The output values of each block in the hardware logic are "R" and the input values of each block in the hardware logic are "R/W".
*2 Assign a parameter of two words (32 bits) to an even address.
*3 The setting and storage ranges are determined depending on the type of a counter timer block.
*4 The item cannot be assigned in a 16-bit counter timer block.
Area Buffer memory address Description
High speed area Un\G1000 to Un\G1029 • The items of the input terminals and parameters that are assigned to these areas
are written in a high-speed period (100 μ s).
• The items of the monitors assigned to these areas are read in a high-speed period
(100 μ s).
Low speed area Un\G1030 to Un\G1099 • The items of the input terminals and parameters that are assigned to these areas
are written in a low-speed period (1ms).
• The items of the monitors assigned to these areas are read in a low-speed period
(1ms).
Block Type Variable name R/W
*1
Setting value/
Stored value Description
Counter timer
block Input terminal RUN /STOP R/W 0 Both the "RUN" and "STOP" terminals turn to Low.
1 The "RUN" terminal turns to High and the "STOP" terminal
turns to Low.
2 The "RUN" terminal turns to Low and the "STOP" terminal turns
to High.
3 Both the "RUN" and "STOP" terminals turn to High.
PRESET R/W 0 The "PRESET" terminal turns to Low.
1 The "PRESET" terminal turns to High.
Parameter Count Enable R/W 0 Count Enable is off.
1 Count Enable is on.
Upper Limit
*2
R/W
*3
Set the upper limit value.
Lower Limit
*2
R/W
*3
Set the lower limit value.
Add Value
*2
R/W
*3
Set the addition value.
Preset Value
*2
R/W
*3
Set the preset value.
Monitor Count Value
*2
R
*3
A count value is stored.
Latch Value
*2
R
*3
A latch value is stored.
Overflow
*4
R 0 No overflow occurs.
1 An overflow has been occurred.
Underflow
*4
R 0 No underflow occurs.
1 An underflow has been occurred.
Cam switch block Parameter Step No.0

Step No.15
*2
R/W
*3
Step No. 0

Step No. 15
Comparison
block Parameter Compare Value R/W
*3
Value compared with a count value of the counter timer
External output
block Parameter Enable Forced
Output R/W 0 The forced output is disabled.
1 The forced output is enabled.
Parameter Forced Output R/W 0 The forced output status of the external terminal is off (0: OFF).
1 The forced output status of the external terminal is on (1: ON).
Monitor External terminal
monitor R 0 The output status (0: OFF) of the external output terminal is
stored.
1 The output status (1: ON) of the external output terminal is
stored.