Mitsubishi Electric MELSEC-L Series LD40PD01 - Page 135

9 CREATING A HARDWARE LOGIC
9.2 Multi Function Counter Block
133
9
Assignment of "User Address"
"User Address" can be set to particular internal blocks arranged in a multi function counter block detail window. By assigning
buffer memory addresses to "User Address", the status of input terminals and parameter setting values can be changed with
programs and values of the hardware logic can be monitored during the hardware logic control.
The application varies according to targets to which "User Address" is assigned.
• A buffer memory address cannot be assigned to different user addresses.
• Only even addresses can be assigned to parameters and monitors of two words (32 bits).
Assignment target Application Description
Input terminal Write The value of a buffer memory area specified with "User Address" is written to the hardware logic in a
high-speed (100μs) or a low-speed (1ms) period.
Note that the input terminal status is not read to buffer memory areas. Follow the instructions below.
Even if the input terminal status changes due to signals in the hardware logic, the values in the buffer
memory areas do not change and they are written in a high-speed (100μs) or a low-speed (1ms) period.
Thus, do not assign "User Address" to the terminals linked in the hardware logic.
Do not use buffer memory addresses as the monitors of input terminals because the input terminal
status is not read.
Parameter Write The value of a buffer memory area specified with "User Address" is written to the hardware logic in a
high-speed (100μs) or a low-speed (1ms) period.
Monitor Read A value of the hardware logic is read in a high-speed (100μs) or a low-speed (1ms) period. The value of
a buffer memory area specified with "User Address" cannot be changed by users.
Monitor Cam switch blockCounter timer block
Monitor
Parameter
Parameter
Input
terminal
Parameter