44A392668-G01 GE Input module Brand new

Brand： GE                 Model number：44A392668-G01

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44A392668-G01 GE  Input module Brand new

Client Channels TCP resource 

management

The OS Network stack hangs on to the TCP resources associated with a 

connection for a period of time after the connection is closed. This time 

period applies to the initiator of the close, which is almost always the client 

side. This time is referred to as the “TCP Linger Period”. Once the TCP 

Linger Period expires (60 seconds in the current OS implementation), the 

TCP resources are released. Application developers using client channels 

need to be aware of this behavior when designing their logic. A finite 

number of TCP resources are allocated to client channels, and if channel 

connections are brought up and down so fast that these resources are 

depleted, then the application may have to wait until a TCP resource frees 

up in order to establish another client channel (a COMMREQ Status of 

0xA890 is returned if no TCP resources are currently available; 

application should wait and try again).

SRTP Client Channels provides features that help the user preserve TCP 

connections. These include a period time where one can establish an 

SRTP Channel and specify the channel to run at a given interval, or run 

as fast a possible. One can also specify a number of iterations, or allow 

the channel to run forever. Additionally, SRTP Channels allows channel 

re-tasking of an active channel to the same remote device, where the 

parameters of an active channel, such as changing the channel command 

type (Read/Write), number of repetitions, time periods, local memory 

address, remote memory address, etc. can be changed. SRTP Channels 

also allows channel re-tasking of an active channel to a different remote 

device (changing the remote device’s IP address, etc.). However, retasking to a different remote device will neither conserve TCP 

connections, nor save on the time it takes to create a channel.

Client Channels and Redundant IP In a Redundancy System, Client Channel COMMREQs can only be 

initiated from the unit that owns the Redundant IP address. Therefore, the 

user application logic should use Bit 6 in the LAN Interface Status bit area, 

“Redundant IP Active” as part of their enabling logic that drives a client 

channel COMMREQ.

An attempt to open 17 or more Modbus 

server connections may appear 

successful

If more than the maximum 16 supported Modbus Server Connections are 

attempted, the TCP connection may succeed, but no data may be 

subsequently transferred.

GE    DS3800DMEC1B1B    

GE    DS3800DMEC1C1C    

GE    DS3800DMEC1D1D    

GE    DS3800DMPC    

GE    DS3800DMPC1E1C    

GE    DS3800DMPC1F1E    

GE    DS3800DMPK1B1B    

GE    DS3800DMPK1E1D    

GE    DS3800DOAA    

GE    DS3800DPLA1B1A    

GE    DS3800DPSS1B1B    

GE    DS3800DPSS1C1C    

GE    DS3800DPZA1D1D    

GE    DS3800DSHA1A1A    

GE    DS3800DSHA1A1B    

GE    DS3800DSQD1A1A    

GE    DS3800DSWA    

GE    DS3800DXRA    

GE    DS3800DXRA1C1C    

GE    DS3800DXRC    

GE    DS3800DXRC1    

GE    DS3800HACA    

GE    DS3800HACA1A1A    

GE    DS3800HACB    

GE    DS3800HADA    

GE    DS3800HADA1A1A    

GE    DS3800HADA1B1B    

GE    DS3800HAFA1B1D    

GE    DS3800HAFA-1D1E    

GE    DS3800HAIA1D1B    

GE    DS3800HAIA1E1D    

GE    DS3800HAIA1EID    

GE    DS3800HAIC1A1A    

GE    DS3800HAIC1A1A 6BA00C    

GE    DS3800HAIC1A1A6BA00C    

GE    DS3800HAIC1E1C    

GE    DS3800HARA1B1C    

GE    DS3800HCIB    

GE    DS3800HCIB1B    

GE    DS3800HCIB1B1C    

GE    DS3800HCID    

GE    DS3800HCM1A1B    

GE    DS3800HCMA1E1G    

GE    DS3800HCMB    

GE    DS3800HCMB1C1C    

GE    DS3800HCMC    

GE    DS3800HCMC1A1B    

GE    DS3800HCMC-1A1B    

GE    DS3800HCVA1H1G    

GE    DS3800HCVA1J1G    

GE    DS3800HDDD    

GE    DS3800HDID1A1A    

GE    DS3800HDRA    

GE    DS3800HDRA1B    

GE    DS3800HDRA1B1B    

GE    DS3800HDRC1A1A    

GE    DS3800HFPB1F1E    

GE    DS3800HFPC    

GE    DS3800HFPC1L1H    

GE    DS3800HFPE1D1C    

GE    DS3800HFPG1C1B    

GE    DS3800HFPG1D1B    

GE    DS3800HFPG1D1C    

GE    DS3800HFPG1D1D    

GE    DS3800HFPG1E1E    

GE    DS3800HFXA1F1D    

GE    DS3800HFXB    

GE    DS3800HFXB1G1C    

GE    DS3800HFXB1R1H    

GE    DS3800HFXC    

GE    DS3800HFXD    

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