Operational Specifications; Operation Start Timing; Operation Mode - Mitsubishi Electric MELSEC iQ-R Series User Manual

2.2

Operational Specifications

This section shows the operational specifications of this product.

Operation start timing

The following processing of this product is performed after the READY LED and OS LED are turned ON.
• Processing of user programs that use functions provided by this product
• Response to access from other stations and peripheral devices
Access this product after both of the LEDs turn ON.
To operate a system according to the operation start timing, create an interlock with special relays or special registers. If other
modules cannot access special relays or special registers, create a program which copies values to other devices and CPU
buffer memory.
Special relay or special register
LED status (SD201)
Special relays or special registers of each network module
Precautions
This product cannot respond to other stations and peripheral devices until the READY LED turns ON. Therefore, depending
on parameters and system configurations, the response time of this product may be delayed because parameter check and
the initial processing of each module may take time for the READY LED to turn ON.

Operation mode

This product has the following three modes to operate in: normal mode, maintenance mode, and USB boot mode.
Mode
Normal mode
*1*2
Maintenance mode
*1*2
USB boot mode
*1 Only the function(s) shown in the right column can be performed when selecting the maintenance mode or USB boot mode.
*2 To start this product in the normal mode, turn the power of this product OFF and ON.
When using a function in each operation mode, make sure to turn the power of this product OFF and ON after the operation of the
function completes. If turning the power OFF while the function is in progress, this product may not operate properly.
To perform the bus access diagnostics and a Windows recovery, configure a system which only includes a
power supply, a base unit, and this product. In addition, to operate this product in the normal mode after
performing the bus access diagnostics or a Windows recovery, check in advance that this product operates
normally.
2 SPECIFICATIONS
26
2.2 Operational Specifications
Description
The operation start of this product can be confirmed by checking the READY LED status and
the OS LED status.
The status of communication between this product and a target station can be checked.
Description
A mode when operating normally
A mode to select when performing the following functions:
• Bus access diagnostics (Page 202 BUS ACCESS DIAGNOSTICS FUNCTION)
• Parameter/event history initialization function (Page 217 PARAMETER/EVENT HISTORY INITIALIZATION
FUNCTION)
A mode to select when performing the following function:
• Windows recovery (Page 99 Windows Recovery)