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3.5
Initial Device Value
This function registers data used in a program to the device or the buffer memory of the intelligent function module
without a program. By using this function, creating a device data setting program can be omitted in the initial
processing program.
Using an initial device value can omit creating device data
setting program in an initial processing program.
(1) Timing when initial device values are written to the specified device
The CPU module writes data in the specified initial device value file to the specified device or the buffer memory
of the intelligent function module when:
• the CPU module is powered off and then on,
• the CPU module is reset, or
• the CPU module status is switched from STOP to RUN.
(2) Devices that can be used
The following shows devices that can be used for initial device value.
• Current timer value (T)
• Current counter value (C)
• Link register (W)
• Special register (SD)
• File register (R, ZR)
• Extended link register (W)
*1
The initial device value setting has a priority over the latch setting.
*2
To use an intelligent function module, select "Module Synchronization" because the initial device value may not be
correctly set to the target module. ( Page 350, Appendix 1)
Initial device value
*1
• Current retentive timer value (ST)
• Data register (D)
• Link special register (SW)
• Intelligent function module device (U\G)
• Extended data register (D)
CHAPTER 3 CPU MODULE FUNCTIONS
Device memory
Device memory
*2
3
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