ABB FEPL-02 Ethernet POWERLINK, User Manual

Page: 137 / 142

Appendix C – IdentResponse Frame 137
NMT Service Slot data fields of IdentResponse
Field Abbr. Description
Priority PR Flags: Indicates the priority of the
requested asynchronous frame (see
4.2.4.1.2.3)
RequestToSend RS Flags: Indicates the number of
pending requests to send at the CN.
The value C_DLL_MAX_RS indicates
C_DLL_MAX_RS or more requests, 0
indicates no pending requests.
Values: 0…C_DLL_MAX_RS
NMTStatus stat Reports the current status of the CN’s
NMT state machine.
EPLVersion eplv Indicates the POWERLINK version to
which the CN conforms.
FeatureFlags feat Reports the feature flags of the
device.
(NMT_FeatureFlags_U32)
MTU mtu Reports the size of the largest IP
frame that can be transmitted over the
network, including the size of the
transport header.
Values: C_DLL_MIN_ASYNC_MTU
…
C_DLL_MAX_ASYNC_MTU
PollInSize pis Reports the actual CN setting for
PReq datablock size
(NMT_CycleTiming_REC.PReqActPa
yloadLimit_U16).
PollOutSize pos Reports the actual CN setting for
PReq datablock size
(NMT_CycleTiming_REC.PReqActPa
yloadLimit_U16).
ResponseTime rst Reports the time required by the CN
to respond to PReq.
(NMT_CycleTiming_REC.PResMaxL
atency_U32)