Fujitsu MHV2080AS, MHV2060AS, MHV2040AS manual Response to diagnostic command

Models: MHV2060AS MHV2080AS MHV2040AS

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Operations

6.1.4 Response to diagnostic command

When the master device receives an EXECUTE DEVICE DIAGNOSTIC command and the slave device is present, the master device checks the PDIAG- signal for up to 6 seconds to see if the slave device has completed the self- diagnosis successfully.

The master device does not check the DASP- signal.

After the slave device receives the EXECUTE DEVICE DIAGNOSTIC command, it shall report the result of the self-diagnostics to the master device as described below:

PDIAG- signal: negated within 1 ms and asserted within 5 seconds

The asserted PDIAG-signal is negated 5 seconds after it is asserted if the command is not received. If the command is received, the PDIAG-signal is negated according to timing at which the command is received.

When the IDD is set to a slave device, the IDD asserts the DASP- signal when negating the PDIAG- signal.

X'1F7' Reg.

Write

Master device

Status Reg.

BSY bit

Max. 6 sec.

If the slave device is preset, PDIAG- signal is checked for up to6 seconds.

Slave device

BSY bit

Max. 1 ms.

PDIAG-

DASP-

Max. 5 sec.

Figure 6.4 Response to diagnostic command

6-6

C141-E221

Page 246
Image 246
Fujitsu MHV2080AS, MHV2060AS, MHV2040AS manual Response to diagnostic command