YOKOGAWA Models ALR111, ALR121 Serial Communication Modules (for FIO)
The serial communication modules (ALR111 and ALR121) hardware specifications are as shown below.
Table Serial Communication Module Hardware Specifications
Item Specifications
Model ALR111 ALR121
Interface RS-232C RS-422/RS-485
Connection method Point-to-point Point-to-point (RS-422)
Multipoint (RS-485)
Communication function Half-duplex
Synchronization method Start-stop synchronization
Transmission speed 1200/2400/4800/9600/19200/38400 bps (*1)
Transmission code ASCII/binary
Character length 7/8 bits
Stop bit length 1/2 bits
Parity check None/even/odd
Lag time after data transmission 1 ms (The lag time to start receiving data again after data transmission.)
Transmission distance Maximum 15 m Maximum 1200 m (total extended length)
Installation method Mounted on ANB10, ANB11, ANR10, AFF50, AFV10, AFV30, or AFV40
I/O wiring AKB131. AKB132. AKB133. AKB134 cables, etc. Cable with 3-pair shield, AKB161. or AKB162
Wiring connection D-sub-9-pin (female x 2) Clamped with terminal block’s M4 screws
(5 poles x 2)
Current consumption 0.5A
Weight 0.3 kg 0.3 kg
*1: The applicable transmission speed depends on the communication function, subsystems, and connection method.
An FCS collects data from subsystems or sets data with control calculations to subsystems using the builder functions
by way of serial communication modules. A communication module selects only one communication function, thus
two ports must have identical communication functions. It is not possible to select different communication function
for every port. The communication functions and those transmission speeds for each communication module are as
shown in the table below.
Table Communication Functions for Communication Modules
Communication function ALR111 ALR121
FA-M3 communication DR DR
Modbus communication DR DR
MELSEC-A communication DR DR
YS communication with direct connection NIL SG
YS communication NIL SG
SLC500 communication SG SG
PLC-S communication SG SG
DR: Dual-redundant communication is applicable. SG: Only single communication is applicable. NIL: Not complied
Table Transmission Speed by the Communication Function
Communication function Transmission speed (bps)
FA-M3 communication 1200/2400/4800/9600/19200/38400 (*1)
Modbus communication 1200/2400/4800/9600/19200
MELSEC-A communication 1200/2400/4800/9600/19200
YS communication (direct connection) 9600
YS communication 9600
SLC500 communication 1200/2400/4800/9600/19200
PLC-S communication 1200/2400/4800/9600/19200
*1: The transmission speed of 38400 bps is not available for some PC link modules
Hardware Requirements
The serial communication module runs on the following FCS.
AFV30S, AFV30D, AFV40S, AFV40D, AFV10S, AFV10D,
AFS30S, AFS30D, AFS40S, AFS40D,
AFG30S, AFG30D, AFG40S, AFG40D,
AFG81S, AFG81D, AFG82S, AFG82. AFG83S, AFG83D, AFG84S, AFG84D,
AFF50S, AFF50D
Software Requirements
The serial communication module runs on the control functions of the following FCS.
LFS1700 Control Function for Field Control Station (for AFV30/AFV40, Vnet/IP and FIO):
for AFV30/AFV40
LFS1500 Control Function for Field Control Station (for AFV10, Vnet/IP and FIO): for AFV10
LFS1300 Control Function for Standard Field Control Station (for V net and FIO): for AFS30/AFS40
LFS1330 Control Function for Enhanced Field Control Station (for V net and FIO):
for AFG30AFG40/AFG8
LFS1350 Control Function for Compact Field Control Station (for V net and FIO): for AFF50
Engineering Requirements
Works on LHS5100/LHMS5100 Standard Builder Function.
INSTALLATION ENVIRONMENT
LFS1700 Control Function for Field Control Station (for AFV30/AFV40)
No. of ALR111/ALR121/ALE111/ALP111 or ALP121/ AGS813/AGP813
modules
No. of ALF111 modules
No. of all the communication modules
I/O data capacity for communication
No. of communication definition
No. of communication functions
Max. 8 units/FCS
(Max. 4 pairs for dual-redundant operation) (*1)
Max. 30 units/FCS
(Max. 15 pairs for dual-redundant operation)
Max. 30 modules/FCS (*1) (*2)
1000 words/ALR111. 1000 words/ALR121
128 definitions/ALR111. 128 definitions/ALR121
Communication I/O data capacity
ALP111 and ALP121 cannot be mounted on the same FCS together.
Max. 8 types/FCS (*1) (*3)
Max. 8000 words/FCS
(incl. data from other communication function)
This is the sum of ALR111. ALR121. ALE111. ALF111. ALP111 or ALP121. AGS813. and AGP813 modules.
This is the sum of communication functions of ALR111. ALR121. ALE111. and ALP111 or ALP121.
LFS1700 Control Function for Field Control Station (for AFV30/AFV40) + LFS1750 Node Expansion
Package (for 10 nodes)
No. of ALR111/ALR121/ALE111/ALP111 or ALP121/AGS813/AGP813
modules
No. of ALF111 modules
No. of all the communication modules
I/O data capacity for communication
No. of communication definition
No. of communication functions
Max. 16 units/FCS
(Max. 8 pairs for dual-redundant operation) (*1)
Max. 32 units/FCS
(Max. 16 pairs for dual-redundant operation)
Max. 48 modules/FCS (*1) (*2)
1000 words/ALR111. 1000 words/ALR121
128 definitions/ALR111. 128 definitions/ALR121
Communication I/O data capacity
ALP111 and ALP121 cannot be mounted on the same FCS together.
Max. 8 types/FCS (*1) (*3)
Max. 8000 words/FCS
(incl. data from other communication function)
This is the sum of ALR111. ALR121. ALE111. ALF111. ALP111 or ALP121. AGS813. and AGP813 modules.
This is the sum of communication functions of ALR111. ALR121. ALE111. and ALP111 or ALP121.