Troubleshooting (continued)Table 7-29:
Symptom Possible causes Corrective action
4. Schedule 4. Block is not scheduled and there-
fore cannot execute to go to Target
mode. Schedule the block to execute.
Mode will not leave IMAN. Back calculation BKCAL_IN
a. The link is not configured (the status
would show Not connected). Con-
figure the BKCAL_IN link to the down-
stream block.
b.The downstream block is sending
back a Quality of Bad or a Status of
Not Invited. See the appropriate
downstream block diagnostics for cor-
rective action.
Mode will not change to AUTO. 1. Target mode not set 1. Set target mode to something oth-
er than OOS.
2. Input 2. IN
a. The link is not configured (the status
would show Not connected). Con-
figure the IN link to the block.
b.The upstream block is sending back
a Quality of Bad or a Status of Not
Invited. See the appropriate up-
stream block diagnostics for correc-
tive action.
Mode will not change to CAS. 1. Target mode not set. 1. Set target mode to something oth-
er than OOS.
2. Cascade input 2. CAS_IN
a. The link is not configured (the status
would show Not connected). Con-
figure the CAS_IN link to the block.
b.The upstream block is sending back
a Quality of Bad or a Status of Not
Invited. See the appropriate up-
stream block diagnostics for correc-
tive action.
Mode sheds from RCAS to AUTO. 1. Remote cascade value 1. Host system is not writing RCAS_IN
with a quality and status of good
cascade within shed time (see 2 be-
low).
2. Shed timer 2. The mode shed timer, SHED_RCAS,
in the resource block is shed too low.
Increase the value.
Foundation Fieldbus
Reference Manual 171
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