Mitsubishi Electric Melsec iQ-R Series User Manual page 130

CH1 HART extended field device status
The extended field device status sent from the connected HART-enabled device is stored.
b15 b14 b13 b12 b11 b10 b9
0 0 0 0 0
(2)
(1) HART extended field device status
(2) b8 to b15 are fixed to 0.
When each bit is turned on, the status of the HART-enabled device is indicated as follows:
Target bit Extended status
bit0 Maintenance required
bit1 Device variable alert
bit2 Critical power failure
bit3 Failure
bit4 Out of specification
bit5 Function check
bit6, bit7 Not used
■Refreshing cycle
The stored status information is automatically refreshed every HART cycle time.
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH HART extended field device status
APPX
128
Appendix 3 Buffer Memory Areas
b8 b7 b6 b5 b4
0 0 0
Description
Indicates that the maintenance of the HART-enabled device is required.
The HART device variables are in a warning state. For details, check the device variable status.
This bit is used when a HART-enabled device running on a battery is connected. When the bit is turned on,
this indicates electric power is significantly reduced.
This bit is turned on when HART device variables (such as process value and control value) become invalid
due to a failure of a field device or other peripheral devices.
This bit is turned on when the environment that does not meet the specifications may adversely affect
measurement or accuracy.
This bit is turned on when HART device variables become temporarily invalid due to the processing being
executed on the HART-enabled device.
■Example
When the HART-enabled device is frozen

CH1
2081
b3 b2 b1 b0
(1)
CH2 CH3 CH4
2093 2105 2117
CH5 CH6 CH7
2129 2141 2153
CH8
2165