Honeywell EXCEL 5000 OPEN SYSTEM XFL521B Product Data page 3

NV Name Type
nviRequest SNVT_obj_request RQ_NORMAL
nvoStatus SNVT_obj_status
nciNetConfig SNVT_config_src
nvoFileDirectory SNVT_address
SCPTminSendTime SNVT_time_sec
SCPTmaxSendTime SNVT_time_sec
XFL52xB Module Response Times
The response time of Distributed I/O modules is defined as
the period of time between the updating of the physical signal
and the updating of the NV (or vice versa). The response
time varies somewhat due to certain factors and is also
dependent upon the module type (refer also to Table 4).
The total system response time represents the sum of the
response times of all involved devices. When operating in the
open mode, a fast response time of 40 ms can be achieved,
thus enabling them to be employed in time-critical
applications.
Table 3. Node Object network variables.
Range
RQ_DISABLE
RQ_ENABLE
RQ_UPDATE_STATUS
RQ_REPOPRT_MASK
RQ_SELF_TEST
CFG_LOCAL (default)
CFG_EXTERNAL
1.0 to 10.0s
(default = 1.0)
1.0 to 6553.4s
(default = 60.0s)
Module
XFL521B
XFL522B
XFL523B
XFL524B
3
Description
Upon receiving an update to nviRequest, nvoStatus is
updated.
RQ_SELF_TEST is used only in the XFL522 analog
output module for outputs configured as a motor. In
this case, a synchronization is performed to set the
actuator in the 0% position.
Reports the status of the node upon request through
nviRequest.
This configuration variable is set to CFG_LOCAL at
the factory and whenever the rotary HEX switch is
reset. If it is set to CFG_EXTERNAL, a network
manager will assign a network address for the node. In
this case, the module will not modify its location string
as long as the rotary HEX switch is not reset.
Points to a file directory in the address space of the
Neuron® chip containing descriptors for the files in the
module. It is used to access the configuration pro-
perties stored in configuration parameter files
accessed by network management read/write
messages.
Defines the minimum period of time between output
variable transitions. This configuration property is
applicable only to output NVs of the input modules.
Defines the maximum time period of time before out-
put NVs are automatically updated. It must be set to a
higher number than SCPTminSendTime. This con-
figuration property is applicable only to output NVs of
the input modules.
Table 4. Response time (RT)
Typical RT Max. RT
(sec) (sec)
0.8 1.6
0.2 0.4
0.3 0.5
0.2 0.4
DISTRIBUTED I/O
Min. time between
2 updates
SNVTMinSendTime
(default: 1 sec)
n.a.
SNVTMinSendTime
(default: 1 sec)
EN0B-0090