Instruction Manual

Instruction Manual
D103434X012
Blocks
November 2014
87
D RemoteOutput (ROut)—The OUT [9] is provided by a host computer that writes to the ROUT_IN [33] parameter.
D Local Override (LO)—The track function is active. OUT [9] is set by TRK_VAL [39]. The BLOCK_ERR [6] parameter
shows Local override.
D Initialization Manual (IMan)—The output path is not complete (for example, the cascade‐to‐slave path might not be
open). In IMan mode, OUT [9] tracks BKCAL_IN [27].
D Out of Service (OOS)—The block is not processed. The OUT [9] status is set to Bad: Out of Service. The BLOCK_ERR
[6] parameter shows Out of service.
You can configure the Man, Auto, Cas, and OOS modes as permitted modes for operator entry.
Mode Handling
Shed Options—RCAS Mode Only
Shed from or climb to a remote mode is determined by the parameter SHED_OPT [34]. A block climbs and sheds
through the same path. For example, if SHED_OPT [34] specifies that a block should shed to Auto, then, if the block
target mode is set to RCas, the block goes through Auto on the way to RCas. You can configure the shed option as
follows:
Shed With Return Options
Remote cascade or remote output connection failure shifts actual mode but keeps trying to restore remote cascade or
remote output (in other words, the remote cascade or remote output target mode stays in effect).
Normal—On failure of a remote connection, the block attempts to attain the highest permitted non‐remote mode
until the remote connection is restored. Cas is the highest permitted non‐remote mode and Auto is is the next highest
permitted non‐remote mode. If Cas or Auto are not available, the block will shed by default to Man.
Retained Target—The retained target mode is the mode the block was in before changing to one of the remote target
modes. On failure of a remote connection, the block attempts to attain the retained target mode.
Auto—On failure of a remote connection, the block attempts to attain Auto, if permitted, until the remote connection
is restored.
Man—On failure of a remote connection, the block sheds to Man until a remote connection is restored.
Shed With No Return Options
For any shed with no return option, the target mode changes as determined by the option. Therefore, there is no
attempt to restore the connection following failure. The behavior on change to a remote target mode is identical to
that for Shed With Return Options.
Normal—On failure of a remote connection, the block sets the target mode to the highest permitted non‐remote
mode. Cas is the highest permitted non‐remote mode and Auto is is the next permitted non‐remote mode. If Cas or
Auto are not available, the block will shed by default to Man.
Retained Target—The retained target mode is the mode the block was in before changing to one of the remote target
modes. On failure of a remote connection, the block sets the target mode to the retained target mode.
Auto—On failure of a remote connection, the block sets the target mode to Auto, if permitted.