EP03-300-200
December,
2003
Release 200
Version 1.0
Experion PKS CEE-based Controller Specifications and Models
28
I/O Module and Fieldbus Capacity, continued
Table 13. I/O Link Interface Module (IOLIM) Communications Performance
Maximum Total Parameter Access Response Rate
(Includes all Server Data Requests and peer communications to other
C200/CPMs)
6000 PPS
Maximum IOLIM to CEE Parameter Access Response Rate
(PEERRATEAVG and PEERRATEMAX)
5120 PPS
(Max 1280 channels @ 250
ms publish rate)
Maximum Display Parameters per IOLIM
(DISPRATEAVG and DISPRATEMAX)
1000 PPS
Maximum Initiator Node Pull/Get Request Rate (PEERINITAVG and
PEERINITMAX)
(IOLIM from CEE is fixed at 100 ms)
1000 PPS
(Restricted by Link Unit limit
of 1000, assuming 1 Link
Unit = 1 parameter/sec.)
Maximum Target Node Response Rate to Push/Store Requests
(Currently the SCM Step Output and the Push FB are the only blocks
that can initiate push/store requests from CEE to IOLIM.)
50 PPS
Table 14a. I/O Module Publication Period Specifications
Input Module type
Publication Period
Typical InputI/O Modules
(Includes Series A (Chassis) and Series A and H (Rail) I/O Modules, and FF Linking
Devices with exceptions noted below)
25 ms
High Density/Non-Isolated Analog Input Module
250 ms
RTD Module (CIOM-Series A)
50 ms
Thermocouple Module (CIOM-Series A)
50 ms
Serial Interface Module (CIOM-Series A)
250 ms
Digital Input Module used by 5 ms CEE (local only)
1 ms
For CMs that contain associated input channels, it is recommended that the CM execution period should be set to at
least double the input module sampling period.
Output Module Type
Publication Period
Typical Output Module
Includes Series A (Chassis) and Series A & H (Rail) Output Modules
50 ms & on change
Mixed Module Type
(input & output)
Publication Period
PFB Module (SST-PFB-CLX)
Update rate is configurable on the PBIM block.
Default = 25 ms
Minimum = 12.5 ms
(remote chassis) or 5
ms (local chassis)
Maximum = 50 ms
DeviceNet Bridge Module (1756-DNB)
50 ms
